PC Won't boot up unless CMOS is cleared

[dienan47]

Hi!

I have seen a plethora of the same topic threads in Tom's recently. Here it happened to me roughly a few weeks back. My PC wouldn't boot up. If I clear COMS it would boot up and after I shut it down, it would not boot again. The fans and lights would come up for a moment and then just go off. I stressed the PSU and the CPU, both are holding fine. PSU voltage regulations are in order. I play some GPU heavy games that stress all of my components but I have never encountered a freeze or BSOD (even under the current circumstances) . Basically, my PC won't boot unless COMS is cleared (I replaced the COMS batt with a brand new one two days ago) Also the boot would initiate only if I press and hold the power button for 2-3 seconds, not just press and release.

a recent finding, oddly enough, once I boot the PC and shut it down and leave the power on, the next time the PC would start like there's no problem at all when I just press and relese the power button ( I also replaced the casing, power buttons ok). This is really confusing. Any advice is appreciated.

Thank you

 

[Ironsounds]

Hello... 1) Does this happen with the PS switch shut off between re-starts?
2) Does this happen if the PS is UN-Plugged from your wall outlet, between re-starts?
3) Did you do a CMOS clear BEFORE the NEW battery was put in?

 

[dienan47]

Hello... 1) Does this happen with the PS switch shut off between re-starts?
2) Does this happen if the PS is UN-Plugged from your wall outlet, between re-starts?
3) Did you do a CMOS clear BEFORE the NEW battery was put in?

1. Yes, the power supply does turn off between restarts.
2. Yes, it does. When I pull the plug from the wall, the fans and lights still turn on for a moment and go off
3. Yes, many time to get my PC to boot up

 

[dienan47]

Apart from these observations, my PC acted normally the first time I replaced the CMOS battery the very first time (which I forgot to mention). It worked like a champ and I played some games for a while and played a few movies. The next day I plugged in my phone to charge via USB and I fell asleep. When I woke up, the PC was on stand by and the keyboard wake didn't work. The issue started again.

 

[Ironsounds]

Hello... 4) Can you test the battery? or get Known good one?
5) Is your MB under warranty/RMA yet?
6) Is there a Bio's error message displayed?

 

[dienan47]

I've gotten a brand new battery
No warranty left
No Error messages

 

[Ironsounds]

Hello... Cmos or Bio's chips are a common problem... And I had to have MB's chips repaired or RMA'd... Proper "Power Down/Disconnect" from the PS is always needed because of the +5vdc for USB chips. B /

Contact your Brand/Maker and ask them what it would cost?... sometimes it is a known defect and they might just charge you one-way shipping... it seems we have gave the MB the proper steps to clear a "Boot error" B /

7) Try removing everything from the MB inputs ( just memory, CPU/IGT, on-board GFX )... Hardrive's, Case connections, GPU, cards, etc... and see if another device is causing this... OK?

8) CMOS clear with Single RAM sticks as a Test.

9) Clean your Ram stick connectors with cotton swabs and rubbing alcohol... and re-insert them a few times for a GOOD connection.