PC won't turn on unless I CMOS reset? Asus B450m motherboard

[beuteugeu]

Hello, I have this strange problem:

 

Some time ago, my pc started to need several pushes of the turn on button to eventually turn on. I would sometimes press it for a few seconds, then release, press many times, etc, until the pc turned on. 

Over the last few days, it stopped turning on when doing that, and now I have to use a screwdriver to reset CMOS, and then it will turn on in a single push of the power button.

 

I have already changed the CMOS battery, and it has not solved the problem.

I also tried updating my BIOS to the latest version, and it also did not solve the issue.

 

My specs are: 

Processor: AMD Ryzen 5 3600

Motherboard: Asus Prime B450M Gaming/BR

SSD: WD Black SN750 500GB M.2 2280 NVMe, WDS500G3X0C

Memory: Corsair Vengeance LPX 16GB (2x8) DDR4 3200MHz Black, CMK16GX4M2Z3200C16

PSU:  Corsair HX Series Modular HX750 750 Watts 80 Plus Platinum, CP-9020137-WW

Video Card: NVIDIA GeForce GTX 1060 3GB

 

Thanks for your help, time and understanding.

 

 

 

 

[TPA50]

What happens if you unplug the power button from the motherboard and short the connectors it plugs in to with a screwdriver?

[beuteugeu]

I tried and it worked. I've now made some "modifications" to the power button, and I will answer tomorrow again, to see if it was indeed the problem - but I think it really was.

 

SHould that be the case, any idea why clearing the CMOS would make it work, while just pressing the button as usual didnt?

[TPA50]

12 hours ago, beuteugeu said:

...any idea why clearing the CMOS would make it work, while just pressing the button as usual didnt?

Personally I don't really know for sure...

Though I found this forum thread explaining the CMOS reset in more detail:

https://forums.tomshardware.com/threads/why-did-resetting-cmos-fix-my-computer.1448595/

[beuteugeu]

It seems that really was the issue. Thanks for your help