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• System freezes during boot process

  - by slugster

  Hi everyone, i have a machine running Win7 Ultimate. It was running fine, then it just froze - all the stuff i was doing was still on the screen, but mouse and keyboard input was ignored, any animation that was happening on the screen stopped, the machine literally just froze. So i rebooted (power off button), from then on the machine will reboot, but it ultimately freezes again. The instance when this happens will vary - i have made it as far as the Windows login screen, but mostly it will do the POST, then give me the option to press F1 to continue or Del to enter BIOS settings (but of course pressing a key has no effect - it's frozen!). I have disconnected everything not necessary for the boot process, the only peripheral that remains attached is the keyboard. (even the network cable is disconnected). Prior to this the machine was operating fine. The install of Win7 is only 2 days old, and it was a fresh reinstall (i.e. not an upgrade or repair). Can anyone give me an indication of what may be wrong here? I'm not sure if this question should be here or on SuperUser, please migrate it if i have chosen the wrong board.

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• USB Device Not Recognized

  - by Franky Chanyau

  Ok this one gets a little bit complicated but bare with me :D A client brought her computer in to be fixed about a week ago, she says she tried charging a new phone she bought from china and immediately after her usb keyboard and mouse stopped working (typical). I had a quick look at it but because I did not have time, I did a simple system restore and it seemed as if the issue was fixed. I promptly sent it back to her but a few days back she called saying that the issue has returned. Turns out the computer was riddled with some virus that also corrupted her XP install so I had to format the whole thing(yes I tried repairing). I hoped that the format would fix the keyboard and mouse issue but the whole thing has escalated and the computer will throw the "USB Device not recognized" error when I plug anything into the many usb ports it has. I have installed all the drivers (including the chip set drivers) for the pc and even tried the unplugging from the power for a while trick, still no luck. I am sure it is not a hardware issue, but may be wrong. This is way over my head. Can anyone help? Computer: HP Compaq DC7100, Intel Pentium 4, 512mb RAM OS: Windows XP Professional SP2

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• Computer won't go into standby

  - by Robert

  When I select Start-Turn off computer-Standby the 'turn off computer' option window closes, and then nothing else happens. I can start new applications, and Windows acts like I never selected standby. I ran it for several hours after that. If I have a TV program scheduled to record when I select standby I get a window (the Pinnacle TV software) asking if I'm sure, there are programs scheduled to record - and the computer just keeps running after I select yes, never going into standby. I added that detail as it shows the standby process is starting. [This problem also happens if a TV program is not scheduled, so the scheduler task in not running/in memory. This problem happens regardless of whether I'm not watching TV. This problem happens regardless of whether Media Center is running (it usually isn't, I'm using Pinnacle to watch TV).] I looked at "How to troubleshoot hibernation and standby issues in Windows XP" http://support.microsoft.com/kb/907477 - ACPI is enabled, and "standby" is an option in "Power Options Properties." So it appears to be setup correctly. Windows XP SP3 Media Center Edition, all current updates installed.

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• Computer resetting semi-randomly

  - by Peter

  Hi, I'm having a problem with my desktop whereby it sometimes resets itself semi-randomly. For example, I'll switch it on, it'll boot an OS and shortly after getting to the desktop it will immediately reset with no warning. The time isn't consistent - sometimes it does it before reaching login. I'm pretty sure it's not an OS thing; have tried Ubuntu and a Windows install and both exhibit it. It also doesn't appear to be heat-related because sometimes it appears to be able to "get past" it and will then run stably even under load; if anything it seems to be worse from a cold start. My gut feeling is some kind of power issue but I'm clutching at straws a little. Any suggestions on how I could go about testing it or trying to narrow the problem down would be appreciated. The machine is four years old now so while I can replace components if needed, it's not worth enough that I'm comfortable buying new parts without being pretty confident that they'll fix the problem. Thanks in advance for any help :) Edit: Okay, the motherboard is a MSI K8N SLI; CPU is an Athlon64 X2 4200+. Has one video card, a GeForce 7800GT. 1GB RAM, not sure of brand; 3 hard drives, two SATA and one PATA. Flashed motherboard to latest BIOS some time ago. Edit the Second: I thought I'd narrowed it down to the PSU for a while, but then it recurred again. I ended up pulling everything out but CPU, RAM and motherboard and it still seems to be stuffed (if anything, it's gotten worse in the last couple of days). I assume it's one of those three components, but the machine is old enough that I don't really want to spend money replacing any of them. So thanks for everyone's suggestions; much appreciated!

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• How do I boot [embedded] linux from sd card?

  - by Brandon Yates

  I am hacking together a quick embedded linux system on a DM816x evm board. Previously I have been using TFTP and NFS to load my kernel and root filesystem to the board. I am now trying to switch over to loading everything from an SD card. I have my card partitioned such that uBoot and my kernel image are in one partition, and my rootFS in another partition. At power-on, Uboot starts correctly and successfully launches the kernel. However, the kernel is unable to mount the root file system. It appears that it doesn't recognize any SD (mmc) cards. It gives this error message. VFS: Cannot open root device "mmcblk0p2" or unknown-block(2,0) Please append a correct "root=" boot option; here are the available partitions: 1f00 256 mtdblock0 (driver?) 1f01 8 mtdblock1 (driver?) 1f02 2560 mtdblock2 (driver?) 1f03 1272 mtdblock3 (driver?) 1f04 2432 mtdblock4 (driver?) 1f05 128 mtdblock5 (driver?) 1f06 4352 mtdblock6 (driver?) 1f07 204928 mtdblock7 (driver?) 1f08 50304 mtdblock8 (driver?) Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) I feel like I'm missing something fundamental here. Why does it not recognize the root device I am trying to load from? Here is my uBoot boot script that is running: setenv bootargs console=ttyO2,115200n8 root=/dev/mmcblk0p2 rw mem=124M earlyprink vram=50M ti816xfb.vram=0:16M,1:16M,2:6M ip=off noinitrd;mmc init;fatload mmc 1 0x80009000 uImage;bootm 0x80009000

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• Lenovo S10 Ideapad will not boot while original hard drive is installed, neither from hard drive or

  - by aki

  Hello, first time posting here so I'll try to be very clear. I have a Lenovo S10 Ideapad netbook which fails to boot to an OS. It shows the Lenovo splash screen and can get to the BIOS but it doesn't get to GRUB (was dual booting Ubuntu 9.10 and Win 7, was working fine for months, ie this isn't a new dual boot gone bad). After the splash screen it displays a flashing cursor in the upper left corner. Power cycled to no avail. Here is what I have done trying to narrow the problem down: The machine will boot to Ubuntu using an install/live USB drive, but only if ANOTHER hard drive is installed or NO hard drive is installed. The boot order always lists USB first. Also, there is a 2 gb RAM upgrade but I think that's fine; the Ubuntu USB drive boots fine with it, and "free" sees the whole 2gb of memory. So it seems like the hard drive is bad. I was able to put the bad drive in a different laptop and mount it to recover files. I'm ready to replace the bad hard drive, but I would like to know if this situation makes any sense. If the hard drive is bad, shouldn't I still be able to boot with the Ubuntu USB drive while the bad drive is installed? I would have expected the machine to boot into Ubuntu anyway even if with a bad drive, since the boot order lists USB first. But it seems that when the bad drive is installed, the machine ignores the USB drive and hangs with the flashing cursor. Thanks for any ideas! Sorry for the long post, I just want to put all the info I have up front! Basically I'm going to buy a new drive, but I am mostly curious if this is a typical or at least not unusual situation.

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• Single computer on network cannot connect to internet.

  - by user34630

  Hi All, I hope you can help me out! :) I have 3 computers and one device (Xbox) on my home network; 2 running XP and one on Vista. The computer that can't connect to the internet (XP) is old and failing, and shows no warning before it completely runs out of battery. Thus today, I started it up forgetting that I had unplugged it the night before, and it just ran out of battery entirely whilst I was using it and died. I think that before this I had been browsing the internet, but I can't remember for certain. (i.e. The problem I am having may or may not have been caused by this 'hard' power off). Anyway, now when I start the computer up it takes 5-10 minutes after logging on to display the start bar and icons. Also, I cannot browse the internet. The computer seems to connect to the network OK (I have tried both wired and wireless), but I can't visit sites and can't ping web addresses. Pinging the router fails, as does pinging another of my computers on the network. I have never encountered something like this before, and whilst I am no noob I am also not a sysadmin, haha. :( Any help is greatly appreciated, thank you for your time. P.S. I have tried a system restore (newbie move?).

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• How to choose the most optimal RAID settings on PE2950

  - by javano

  I have some Dell PowerEdge 2950's with 4x 15k, 150GB Cheetah SAS drives in them. They are going to be VM hosts, CentOS running ESXi with Windows Server 2k8 guests. Some guests will be hosting IIS servers, and others MSSQL servers. I am trying to set the RAID virtual disks settings and can't decide which is more optimal given this situation; Read Policy: Out of Read-Ahead, No-Read-Ahead and Adaptive Read-Ahead, the default is Read-Ahead. I will be making large sequential writes initially, writing out blank images for virtual machine hard drives (lets say 30GBs from /dev/zero for example) so Read-Ahead seems good at first. But within the virtual machines reads could be random from anywhere within their file systems as they are IIS and MSSQL servers, so perhaps No-Read-Ahead is a better idea? Now I think Adaptive Read-Ahead would be better then as a compromise but I don't know much about this option, how does it compare in performance to the others? Write Policy: write-back caching, write-through caching, the default is write-back caching. The default of write-back caching is safer than write-through caching but at a performance expense. My thinking here is that in the event of power loss for example, it seems more likely in my head (this is why I need some clarification!) that damage will occur to a guest VM with write-back caching enabled, so I should favour write-through? I have searched around and there is obviously no definitive answer, so I would like to find out what is best for my situation.

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• Probability of Blade Chassis Failure

  - by ChrisZZ

  In my organisation we are thinking about buying blade servers - instead of rack servers. Of course technology vendors also make them sound very nice. A concern, that I read very often in different forums, is, that there is a theoretical possibility of the server chassis going down - which would in consequence take all the blades down. That is due to shared infrastructure. My reaction on this probability would be to have redundancy and by two chassis instead of one (very costly of course). Some people (including e.g. HP Vendors) try to convince us, that the chassis is very very unlikely to fail, due to many redundancies (redundant power supply, etc.). Another concern on my side is, that if something goes down, spare parts might be required - which is difficult in our location (Ethiopia). So I would ask to experienced administrators, that have managed blade server: What is your experience? Do they go down as a whole - and what is the sensible shared infrastructure, that might fail? That question could be extended to shared storage. Again I would say, that we need two storage units instead of only one - and again the vendors say, that this things are so rock solid, that no failure is expected. Well - I can hardly believe, that such a critical infrastructure can be very reliable without redundancy - but maybe you can tell me, whether you have successfull blade-based projects, that work without redundancy in its core parts (chassis, storage...) At the moment, we look at HP - as IBM looks much to expensive... thanks a lot best regards Christian

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• How to disable irritating Office File Validation security alert?

  - by Rabarberski

  I have Microsoft Office 2007 running on Windows 7. Yesterday I updated Office to the latest service pack, i.e. SP3. This morning, when opening an MS Word document (.doc format, and a document I created myself some months ago) I was greeted with a new dialog box saying: Security Alert - Office File Validation WARNING: Office File Validation detected a problem while trying to open this file. Opening this is probably dangerous, and may allow a malicious user to take over your computer. Contact the sender and ask them to re-save and re-send the file. For more security, verify in person or via the phone that they sent the file. Including two links to some microsoft blabla webpage. Obviously the document is safe as I created it myself some months ago. How to disable this irritating dialog box? (On a sidenote, a rethorical question: Will Microsoft never learn? I consider myself a power user in Word, but I have no clue what could be wrong with my document so that it is considered dangerous. Let alone more basic users of Word. Sigh....)

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• Wastage of resources in Virtualization

  - by Sabeen Malik

  I have asked this question on SO, but was suggested that i ask it here on SF, so here it goes. http://stackoverflow.com/questions/3010753/wastage-of-resources-in-virtualization I am not sure if this is the right place to ask the question. However i hope it is. When looking for a VPS earlier today, I was trying to understand how each container would work in the background. Keeping in mind the fact that the operating system uses most of the memory and power on a system, wouldn't having multiple operating systems in the same machine mean more wastage of resources. For instance if i was running centOS on a dedicated box and it was running lets say 20 background OS level processes. Then i go and install a virtualization platform and install 5 more centOS virtual machines in the same system which are exactly the same as the host operating system. Doesn't this mean duplication of those 20 processes 6 times? So internally the context switching is happening between 120 processes instead of 20? Further Notes: Here is an example of what i am thinking: I have a master-slave configuration for a long running, cpu + memory intensive process, which can be distributed to 4 machines. Lets say when the process runs on these 4 machines with lets say 1 Gh CPU and 1 Gig RAM, i get 400 results per hour from the cluster (assuming 100 results from one machine) . Now i get a bigger machine ( lets say 4Gh and 4 Gig RAM), have 4 virtual hosts on it with 1 Gz CPU and 1 Gig RAM. Will this configuration give me the same 4 results per hour from these 4 virtual hosts?

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• Is Unix not a PC Operating System?

  - by Corelgott

  I am doing my Bachelor at a university. In a written assignment the professor posted the task: "Name 3 PC-Operating Systems". Well, I went on an included a variety of OS (Linux, Windows, OSx) including Unix & Solaris. Today I recieved a mail from my prof saying: Unix is not a PC-Operating System. Many Unix-variants are not PC-hardware compatible (like AIX & HP-UX. About Solaris: there was one PC-compatible version...) I am kind of suprised: Even if may Unix-variants are Power-PC and different bit-order – Those don't stop being PCs now, right? The question was given in a written assigment! It was not a question that came up during lecture! Due to the original task being in German, I'll include it just to make sure nobody suspects an error in the translation. Frage: Nennen Sie 3 PC-Betriebssysteme. Antwort: Unix ist kein PC-Betriebssystem, viele Unix-Varianten sind nicht auf PC-Hardware lauffähig (AIX, HP-UX). Von Solaris gab es mal eine PC-Variante.

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• HyperV - low CPU usage

  - by Klark

  I am very new to HyperV and virtual machine philosophy in general, so please expect more or less nooby questions :) I have a server that is only used as a host for virtual machines. OS is windows server 2008 R2 and it is running on 16 CPU and 48 GBs of RAM. On aforementioned server there are 8 VMs, each having 4 CPUs and 4 GBs of RAM. On those VMs we are running some CPU intensive tasks. Each machine has nearly 100% cpu usage. After I noticed slow performance I went to the host machine and started playing with process explorer. It turned out that cpu usage is very low. Also I/O is very low, and of course, memory consumption is high, which is expected. Of course, I don't expect that those 4 virtual cores dedicated to a VM work as fast as real, hardware 4 cores, but still I expected a higher consumption of real hardware. Is this sort of behaviour normal? I see that the most of CPU usage on host machine are marked as interrupts (which I guess is normal) and all those interrupts are passed to only one core (which is strange). Are there out of box optimization that I could perform to finally use all that processing power that is under the hood. My knowledge of virtualization technology is near to embarrassing, so I would be grateful for any links that could enlightened me :) Thanks.

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• How to forever disable driver signature enforcement in Windows 8

  - by IneedHelp

  Is there a way to forever disable driver signature enforcement in Windows 8? I keep seeing this solution posted on various blogs and forums: bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS bcdedit -set TESTSIGNING ON but it is not working, at least not like when you manually disable driver signature enforcement. To disable driver signature enforcement, I currently have to do this everytime I restart my PC: 1. From the Metro Start Screen, open Settings (move your mouse to the bottom-right-corner of the screen and wait for the pop-out bar to appear, then click the Gear icon). 2. Click ‘More PC Settings’. 3. Click ‘General’. 4. Scroll down, and click ‘Restart now’ under ‘Advanced startup’. 5. Click ‘Troubleshoot’. 6. Click ‘Advanced Options’ 7. Click ‘Windows Startup Settings’ 8. Click Restart. Is there at least a way to create a shortcut or something? F8, Shift+F8 don't work any more at boot. These MS developers freaks really want everything their way only. What's worse is that when I have to power up my PC, I first have to start normally and then restart with driver signature enforcement disabled, because there is no way to tell Windows 8 to show the troubleshoot screen when a PC is powered up.

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• No video signal and server shuts down

  - by Ilya

  I have a brand new server. The motherboard is Intel S2600CP4, two 8-core Intel E5-2600 processors. RAM is 8 DIMM slots of 8 GB each (KVR1600D3D4R11SK4/32GI, I installed them into the blue slots), Power supply is 1050W Corsair. Most of the time the server won't start up - the fans are spinning, but I don't have video signal. And it keeps restarting on its own every 3 mins. But maybe after 30 mins it will eventually load and show something on the screen. I even was able to install ESXi 5.0 (vSphere) on it. It recognizes both CPUs and all of the 64GB of RAM. But even then it worked only for around 5 hours and then restarted on its own. What's the problem? That's a very expensive peace of hardware and I can't afford purchasing a new motherboard/CPU. By the way, on the front panel the "System Status" LED is constantly amber (not blinking), even when the server started successfully. And also in the BIOS I can see lots of "processor 01 unable to apply microcode update 8160" fatal errors. Please help me with issue, I will really appreciate this!

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• SSD causing 100% CPU usage in Apache/PHP

  - by Tim Reynolds

  I wanted to increase the performance on my development laptop so I added an Intel 320 Series SSD as my primary drive. Everything is amazingly fast, as expected, except Apache/PHP. I develop Magento by using an Ubuntu 10.10 virtual machine. Information: Host OS: Win 7 Professional 64bit Guest OS: Ubuntu 10.10 32bit Processor: i7 Chipset QM55 SSD: Intel 320 Series 160gb 30% full HDD: Hitachi 320gb 50% full (in side bay using an adapter) Laptop: Lenovo T510 Using: Shared folders Apache Version: 2.2.16 PHP Version: 5.3.3-1 APC Version: 3.1.3p1 APC Memory: 128M Using tmpfs for cache, log, session directories in Magento In the VM running on the SSD (VM files and source files are on the same drive) loading a product page in the Admin takes on average 26.2 seconds and uses 100% CPU for nearly the entire time. In the VM running on the old HDD loading the same page takes on average 4.4 seconds. It mostly uses around 40-50% of the CPU while rendering the page. I have read this post: Performance issues when using SSD for a developer notebook (WAMP/LAMP stack)? It says to change some settings in the bios. I have turned any and all power management features off in the bios. I can't for the life of me understand why this would be happening.

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• Hard drive spark, can it be recovered?

  - by user163558

  Alright, so I was going to install Source Film Maker but I didn't have any space, so I decided to connect an HDD via an USB converter(image below). I shut down the machine, turned the PSU off, and connected via a Molex connector & the USB converter. I turned back on the PSU, no sparks or anything, everything normal, but when I turned on the machine, I heard some sizzing(lol?) and sparks flying and a little flame, but the PC was running fine. I pressed the power button instead pulling out the plug (I panicked) so it continued to short circuit for about 10 seconds. There's a very little part on the HDD that become ash, it's near the Molex connector and the circuit is a little black as well. I'm afraid that I will damage the HDD more so I didn't hook up the HDD after all. Do you think it's the PSU(came default with Cooler Master Elite 430, 500W) or it's the HDD(Samsung SP1203N)? P.S: I've attached the HDD same way before(like 3 months ago), and it worked. HDD burn: USB connector: Sorry for the bad image quality, taken with my phone.

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• Wireless to Wireless Transfer Slow on a Linksys WRT54GL

  - by Kyle Brandt

  The Situation: When I try to transfer a file from one computer to another that are both connected via wireless on a WRT54GL (in a office) with dd-wrt firmware I often get bad speeds. In generally they average around 100 kilobytes a second. Either computer can download via wireless from the Internet at at about 2 megabytes a second. The speed is slow with the transfer of one large file. There are about 20 other wireless networks that the computers can see, so there is a lot of noise, but I don't have the equipment to really monitor the frequencies well. But that still seems pretty slow. I thought maybe it was the transmit on each card, but even when they are 5 feet away with a line of sight I still get these speeds. According to Linux both cards are operating at 54g. My Questions: Is this normal for this sort of consumer level wireless equipment? Anything I can do to improve it? why is wireless to wireless transfer slow when everything else isn't? Whats steps might I take to figure out what is happening? For example, are lots of packets not making to the access point requiring retransmissions? Above all, I want to find out what the problem actually is. This may seem odd, but at this point I am more interested in understanding what the problem is than fixing it. What I have tried: I have tried messing with lots of settings. Different channels, xmit power, G-Only, none of which has made anything any better. I've also tried upgrading to newer dd-wrt firmware version and doing a reset to wipe out the settings.

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• Dell Studio 1555 not starting up

  - by Abhishek

  This is a 3-year-old laptop. I never had a big problem with it until now. I updated Kubuntu the night before yesterday. And Firefox got updated to version 18 and a few other related packages got updated. Then I shut down the laptop and restarted it, but it failed to start. I could hear the fan and the hard disk and the optical disk drive initialize. And the power button also lighted up. But there was no video - no POST or BIOS menu. I even opened the laptop up to the point when only the motherboard was the only thing attached to the base cover. I took it to the technician this evening. He checked it casually, and said that it might be a motherboard problem and will cost quite a bit to fix. Though he was not sure and said that he will give me a call after confirming the problem. Has anyone else had the same problem? What was it and what was the fix?

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• Laptop shuts down randomly without warning

  - by Robert P.

  My Asus Zenbook UX32V turns off randomly when I'm working on it. This happens both when the computer is recently turned on (5 minutes), and after being on for several days. I'm not running any heavy software The laptop is not heating The fan is not working on the maximum capacity (it's not heating) It happens when the laptop is lying still on the table It is no warning, it simply goes black It happens both when charging and on battery My guess is that it suddenly lose power somehow. What puzzles me is that I can flip the laptop upside down, sideways, shake it, etc. without it shutting off. This makes me think it's not something that's loose causing occasional short-circuits. I realize that the laptop probably doesn't like flipping and shaking, but it was the best way I could troubleshoot. I rarely turn the computer off, only have it in hibernate or sleep mode (most often hibernate). I've never experienced that the laptop is off when I wake it up from sleep mode. I've had the problem for a few months and it happens 2-8 times a week. Specs: Asus Zenbook UX32V Windows 8.1 (it happened in Windows 8.0 too) Intel i5-3317U CPU @ 1.70GHz The laptop is approx 1.5 years, but it has a small dent on one of the sides that probably voids the warranty. The dent has been there since week one and I don't think it's related to the problems I'm having now. Does anyone have a clue what might cause this, and how it might be fixed? I've read all other questions (some of which are listed below) that seem related to my issue, but none report the same behavior as I'm experiencing. Most report heavy games, heating etc. Asus N53J Laptop randomly shuts down Laptop is randomly shutting off Computer shuts down without warning My laptop acer aspire 5720 suddenly turn off randomly Computer randomly shutting down Windows 8.1 randomly shuts self down ASUS K55VM Laptop unexpectedly shuts down

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• How to move Mdadm RAID drive (EBS based) to different AWS Instance

  - by Stanley

  We have a media-rich web application that is hosted on AWS. We have several Web Servers and we have an NFS server. On the NFS server (Linux server) we have several EBS volumes that are mounted and we've used mdadm to implement the different mounted volumes as a single RAID volume. The Web Servers simply access the NFS storage through a mount point. Amazon has now let us know that they will be performing power maintenance on this server in a couple of days time. Since all our media is on here it would render our site unusable for the hours while Amazon is working on it. We want to try and prevent this downtime. I was thinking that we can prevent server downtime by perhaps setting up a new server temporarily and attaching the EBS drives (raid volume) to that server and have our web servers point there during maintenance. This is a very high risk operation since this involves several terabytes of our production data. What would be the safe way to move over our logical raid drive (md0) to a new amazon instance? I was hoping that I could start with building the new server, mounting the ebs volumes and assembling the RAID partition using mdadm --assemble --scan before unmounting from the existing instance so that I can first test that everything works and thus having it mounted on two instances at the same time, but I don't believe that is possible with the way that filesystems work. How do I move a Linux software RAID to a new machine? suggests a way to move drives, but isn't really a cloud-based question. Perhaps there are simpler ways to prevent system downtime with our solution being hosted on the cloud? I have considered taking an EBS snapshot, but that tries to replicate all the many terabytes of mounted storage, so this is not a practical solution. Any ideas?

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• Cheap desktop computer in 19" rack-mountable form-factor?

  - by Alex Basson

  I'm a high school teacher at a small private school. As of this year, we have SMARTBoards in every classroom (though I've had one in the class I share for two years now). The classrooms themselves don't have computers in them, so we teachers bring our laptops to class and connect them to the boards. This has several disadvantages: This takes a few minutes while we wait for the board to boot up and then orient the board to our individual laptop -- we have to do this every time b/c different teachers have different laptops requiring different orientations. This isn't ideal because when you only have 43 minutes per class period, waiting five minutes just to get started is a real waste. Carrying your laptop to class doesn't sound so bad until you consider that we're also carrying textbooks and piles of student papers, and we're carrying it all through crowded high school hallways. More than one laptop has fallen THUNK to the floor, with dire consequences. We feel we could eliminate the need to use our laptops with the SMARTBoards if we had a dedicated computer in each classroom hooked up to the board at all times. Each board set-up is connected to a podium with a standard 19" rack in it, currently housing a power supply and DVD player. There're plenty of rack spaces available. So I'm thinking: maybe we could get some inexpensive computers in a 19" rack-mountable form factor, install them in the podiums, and connect them to the boards on a permanent basis. Any suggestions?

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• Windows memory logged on vs logged off

  - by Adi

  Let's say I power on my fresh installed Windows 7 x64 machine. After Windows boots up, there are a bunch of services being started in the background that start allocating memory. Then I enter my user/pass and Windows logs me in. Let's supose I don't do anythig else (I don't explicitely start any application) and I don't have any other app installed by me. So it's fresh install of my machine. My question is: how much memory is needed for all the UI & other stuff? Is it a good indicator to look into task manager and check all the processes started under my user name and sum up all the memory consumed by those processes to get the total amount of memory I am consuming just to stay logged on? Basically this is my question: how much memory is needed just to stay logged on? Now, if log off would all the memory be released back to the system so that the background services can benefit of? Also, I assume that there might be a different discussion for each Windows flavors (?)

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• Troubleshooting: Monitor never turns on, system fans running, DVD-ROM does not open.

  - by Wesley

  Hi all, Here are my specs beforehand: ECS P4VXASD2+ (V5.0) motherboard FSB 533MHz Intel Pentium 4 2.40A GHz Prescott Socket 478 2x 256MB PC2100 DDR RAM, 2x 256MB PC133 SDRAM CoolMax 350W PSU DVD-ROM - will edit with brand & model 128MB ATi Radeon 9800 Pro AGP No hard drive So, I just put those parts together today and I tried to power it up, with the monitor connected to the Radeon 9800 in the AGP slot (mobo does not have VGA port). After turning it on, the CPU fan, graphics fan and system fan go on. However, the monitor remains in standby mode, despite being plugged in. Also, after pushing the button on the DVD-ROM drive, it does not open. I've used the DVD-ROM drive before with absolutely no issues. The graphics card was slightly buggy when I put it on another machine, which was left outside in winter weather for 3 months. (Still that computer's integrated graphics worked fine.) CMOS battery was replaced and jumpers are all set correctly. Now, I'm wondering whether the motherboard, CPU, PSU or GPU is the problem. What can I do to test which part is the problem? Just to clarify, I don't have a hard drive, so I usually boot Ubuntu from the disc drive. Anyways, thanks in advance!

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• Dell Dimension 8400 Startup error

  - by Michael

  Hello all, thanks first for taking the time to read this and possibly help me...... now I am pretty decent of a computer tech...but not enough. I am having an issue with my computer which is running windows xp and as I mentioned it is a dell Dimension 8400. as soon as I power the system up the fan goes into hyper drive (spins like crazy and is very loud) then the start up screen with dell comes up and the loading bar gets stuck on the process of "Bios Revision A00" and never loads beyound that. I have read alot about it and think that the main problem was that it can not locate the file (which does have an updated version) I think it is A09. I can not enter safe mode, Bios mode or anything. I do have the file on my other computer and I was wondering if there is a way that I can use a usb flash drive (as I have read on other sites) to create a bootable MS-Dos diskette but I am failing at creating as such....is this possible? or is there anything else I can do? I tried to remove the battery from the system for about 10 minutes while it was completely unplug and tried then to reboot it and go into the bios menu but the same thing keeps happening....can anyone help me :-(

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