Question PC only starts directly after turning on power

[Kumariael]

Hi. I have a problem with my PC since a long time. I think it wasn't directly after i build it 2 years ago but shortly after. The PC only turns on directly after i supply it with power. If i turn on the power and wait a few seconds or shut it down and try to turn it on again nothing happens. I need to turn of the power, wait a few seconds, turn it on again and press the power button.

I tried a lot of things:

- updating BIOS
- turn of FastBoot
- remove all Drives (except Boot Drive), the GPU and all Peripherie
- a new PSU
- Turn off ERP in BIOS
- definitely no heat problem
- reset CMOS
- i rebuild the whole PC in a new Case while changing the PSU so all connections should be fine

I don't know what else i could try except a new Motherboard, RAM or CPU, which isn't that easy without buying new stuff (probably lend some from work).

Specs:

- Windows 11 Pro
- Asus X670e Plus Wifi
- AMD 7700x
- XFX 7900 XTX
- G.Skill Trident Z5 Neo Expo RGB DIMM Kit 32GB, DDR5-6000, CL 32-38-38-96
- 2TB Samsung 980 Pro
- LianLi Edge EG1300W Platinum, old beQuiet! Pure Power 12M 1000W

Does anyone have any idea what else i could try or what could be the problem?

 

[COLGeek]

Have you ever disassembled the system to verify that you don't have any extra mounting points/stand-offs under the motherboard itself? These can lead to short conditions and similar issues like you are describing.