Trouble starting up the PC

[adhyi]

Hello!

 

So long story short, some time ago my pc started to act wierd. It works withouth any problems, but if I shut it down (from windows...) and leave it be 30 min or over night... then it won't start up when I press the power button. This is happening quite randomly, in a sense it can do this 4-5 times in a row... then it work fine for a few days

The only solution is to unplug drain power by pressing power button 20 sec or so then it starts.

 

Things I did:

Check all cables to be firmly mounted

Changed power cord

Changed BIOS battery (this worked well for 1 week or so then it started again)

Changed power plan for no sleep/hibernation and disabled fast start up

Disabled fast boot from bios

Checked PSU with paper clip, works fine

Checked power button, works fine(changed the pins on MB with reset switch still not starting)

Tried shorting pins for pwr_sw with screwdriver - no succes

No blown capacitors on MB 

Tried with nothing pluged in, only MB and CPU

I have the latest drivers and bios version

 

Only solution is to unplug drain power and then it works.

Any ideas? Could be the power outlet???

 

Specs:

 

Ryzen R5 3600

Strix X370 F

16 GB Corsair vengeance 3000mhz

Corsair RMI 750W

Sapphire 5700XT Nitro+

Be quiet dark rock pro 3 cooler

Be quiet silent base 800 case

Everything is fairly new, only MB PSU and ram is 2,5 years old

 

2 hdd 3 ssd

 

Cheers!

[Master Disaster]

Start by updating the BIOS to the latest version. Given you're running a Zen 2 on an X370 it must have been updated fairly recently but AMD have released new AGESA code for Zen 2.

 

https://www.asus.com/uk/Motherboards/ROG-STRIX-X370-F-GAMING/HelpDesk_BIOS/

[adhyi]

I have the latest version of the BIOS 5406

[Pharazon001]

i'd try changing the BIOS battery again. since it temporarily solved the problem you might be having and those sorts of problem are usually related to that batter you might have either 1. got a duff battery or 2. some issue with the motherboard which is causing the batter to get drained quickly.

[adhyi]

I can try to do this again. See if it helps.(I bought a good 2032 battery not a cheap garbage)

At the moment I changed the power outlet to see if it makes any difference, will also try with the battery.

[adhyi]

Ok so no cookie with different power outlet, same story.

Changed bios battery again (checked the old one with a multimeter, has same values as new one) and enabled ErP settings in bios... see if it does anything...

[adhyi]

That did nothing...

Reverted to a previous bios version and the problem still persists...

Shouldn't this be a MB issue?