XPS 8940 Power up question

Re: Does the power appearing to turn on and back off with the first press of the power button have something to do with the automated shutdown (PC finishing the complete shut down)

more likely the 1st scenario.  If you manually click shutdown in Windows, wait until all lights are off, turn press power button again, issue does not occur, it would show that a human mediated shut down is different from AI scheduled one.  The latter may involve some deep sleep or hibernate state and you may or may not want to know the nuances.

I too see this oddity on my 8940. That is if I press the power on button, it blinks a few times and then goes out. So I press it again and it works fine.

However, this is ONLY under certain conditions. If I experience a LOCK UP, that is the computer freezes on me, and I need to use the POWER button to turn off the PC, then MOST of the time I see this.

I never have this happen though if I do a SHUTDOWN.

For the record, I do have an Nvidia Card that is why I do have Lock ups.

I suspect, this is due to SOME H/W is a state that was not what the BIOS expected it to be in? That is the Power Button usage did NOT reset the h/w properly? However, turning on the PC the BIOS sees this, and turns the PC off to do the proper RESET (it could be the NVRAM that was not cleared?).

Wondering if you looked in the Event Viewer if you'd see ERROR 41's for the Improper Shutdown?

What command are you using for the Shutdown that you scheduled? I use "C:\Windows\System32\shutdown.exe -s -t 1" for my desktop icon I use to Shutdown (and never see what you are?).

I also have to ask, is this a 'new' occurrence or has this been from day one?

If you open the Reliability Viewer (C:\Windows\System32\perfmon.exe /rel) do you see any issues/errors?

If you do use the Windows Shutdown on the Power icon of the Start Menu, do you see this happening then?

The command used in the scheduled task is "C:\Windows\System32\shutdown.exe -s". When restarting or shutting down from the desktop I just use the Windows Start menu dropdown list (I'm not sure what the command is that Windows uses, nor do I know where to find that information... a "world wide wait" search didn't help).

I don't see any error 41 notations in the event viewer and if I search "shutdown" every event that appears says everything is fine.

This has been happening for a while. Initially I just blamed it on me inadvertently hitting the power button twice, but lately I've been very careful pressing the button and it still takes two attempts to start the PC after an automated shutdown.

@sewing1243​ 

Seems you are doing the 'right thing'?

All I can suggest it run the F12 Hardware test on the Boot F2 menu? Might have something going weird?

I assume no new h/w installed as well?

I'd open the case can check all connectors fully in and the RAM as well? I don't think anything is wrong, but worth checking.

Something I'd guess is not resetting properly? The PC does still keep some power to the PC when you turn it off. I suggest a simple test, pull the power cord when it is off, hold in the power button for a minute, and then plug the power back in and power up, does it still go off? That would if it works fine indicate a problem with some h/w, but I wouldn't know if it was s/w (OS or something else) or the h/w itself.