The title is the symptoms of my problem. I mainly chose this title for search engines so people can know why this is happening since I see a lot of uncertainty when it comes to this problem. I do have a question related to the source of the problem though.

First of all,

Inserting the power to the power supply automatically turns on my computer.

Using a power supply tester, the tester automatically turns on without me having to push the button to test the PSU. lol.

The PG (Power Good) signal is missing.

The strange thing is my computer still turns on (OS boots, etc) considering a missing power good signal.

Is it really that unsafe to use the power supply when it's missing the power good signal? All the voltages seem to be in check.

Here's a picture:

Power Supply Tester Readout

And by safe (considering the readout) in the sense that is it likely my components (cpu, mobo, etc) could be damaged?