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.

 

[DaleH]

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?

You have tried a new PSU. I would measure the power supply voltages when the problem is present and proceed from there, based on the results of the test. There may be something loading the PSU. The PS_On pin should be low to turn on the supply. What voltage is it at when trying to power on the PC?