Troubleshoot Dell PC Does not power on

JakeXPMan

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Oct 20, 2014
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Briefly explain your current issue(s)
PSU test works, shows it's green light but PC is not powering on
Steps taken to resolve, but have been unsuccessful
Power drain (worked first time, but failed all other attempts) changed power plug, switched the jumper, tried to short the pins to turn on.
Your current Antivirus
Windows Defender
Well, after a successful thermal and fan addition, the Dell Optiplex PC was working just fine for a week. so it was time to move it to my Computer area, to replace my old PC.
I plug it in surge protector outlet, nothing happens. ok?! panic... *check internet* Ok, try a power drain for 15-30 seconds. So I did that, took the PC back to working area, plugged in, it's back!

A huge relief, okay... I power it down, (drain power for 30 seconds) Plug back into my main Computer area (the one I am currently using to type this) and it's powering on fine or so it seems, but I then hook up the monitor (wanted to make sure it would turn on!) a different keyboard and mouse too, but I can't see anything the mouse and keyboard aren't bringing me any screen to see. My monitor shows orange. Ok, I need to turn it off and maybe switch monitors, so I push the power button, it shuts down about 3 seconds later. Seems normal shut down (even if I cannot see it).

I try to power it on a few mins later, it won't... tried 5 more power drains for minutes holding the power button, no change. Next day, one more power drain, nothing. So I moved the jumper over (to reset CMOS) and then plug cord in, wait 30 seconds, put it back to original spot... nothing. Then I used screwdriver to try to short the pins to get PC on, nothing.

To say it's a disappointment, is an understatement. Can't afford to buy anything for the next few months or so.
I pretty much give up hope this PC will be useable, I am beyond curious to what in the DELL-HELL happened to my ideal specs Windows 11 PC?! It looks clean as a whistle inside.
It doesn't make sense to me... one day it's working, then it's refusing everything! Removing the power switch from the motherboard pins was like pulling teeth... I never seen such small holes for a pin to fit into!!!

One thing grateful for, is learning things and that fact my old PC I'm on right now... works (still)