The computer fails to start in any condition.

swaggeryooshi
Junior Member

12-31-2025, 09:53 PM

I recently purchased a PC and connected it with excitement, but pressing the power button didn’t work. The motherboard lights up when plugged in, yet it won’t turn on. I tried bridging connectors and checking the manual for pin placement, but everything matched correctly. I also re-seated the CPU, GPU, and memory without success. Now I’m considering a replacement motherboard.

swaggeryooshi

12-31-2025, 09:53 PM #1

_SanSodan_
Junior Member

01-06-2026, 01:29 PM

Begin by resetting the CMOS. Take off the riser and verify functionality using the GPU in the PCI-e port.

_SanSodan_

01-06-2026, 01:29 PM #2

Begin by resetting the CMOS. Take off the riser and verify functionality using the GPU in the PCI-e port.

heroboy17
Senior Member

528

01-06-2026, 08:06 PM

Could you clarify whether the item was purchased used or if you assembled all the components yourself? If it was used, did you inspect it before buying? Was this your first PC build? Do you have any background in PC assembly or troubleshooting?

heroboy17

01-06-2026, 08:06 PM #3

MrShoe
Junior Member

01-06-2026, 08:39 PM

Purchased it used, tested it and everything functioned properly, then upgraded from 5600g to 5900x but it no longer powers on.

MrShoe

01-06-2026, 08:39 PM #4

Purchased it used, tested it and everything functioned properly, then upgraded from 5600g to 5900x but it no longer powers on.

shizzle54
Member

210

01-06-2026, 10:42 PM

I recently used it and encountered the same problem—nothing functions except the motherboard lights.

shizzle54

01-06-2026, 10:42 PM #5

I recently used it and encountered the same problem—nothing functions except the motherboard lights.

_MrDay_
Member

215

01-08-2026, 07:53 PM

It functions correctly when the 5600G is reinstalled. If yes, the CPU might be faulty or improperly placed (the tiny triangle issue).

_MrDay_

01-08-2026, 07:53 PM #6

It functions correctly when the 5600G is reinstalled. If yes, the CPU might be faulty or improperly placed (the tiny triangle issue).

ZakkW
Member

01-26-2026, 08:05 AM

Reinstall the 5600G and test the original setup. If it functions, the problem likely lies with the 5900x—either its BIOS needs updating or it may be defective, especially if purchased secondhand.

ZakkW

01-26-2026, 08:05 AM #7

Reinstall the 5600G and test the original setup. If it functions, the problem likely lies with the 5900x—either its BIOS needs updating or it may be defective, especially if purchased secondhand.

dontal
Junior Member

02-17-2026, 01:42 AM

I sold the 5600g and now have a 5800 available to test. I'll keep you updated if anything shifts.

dontal

02-17-2026, 01:42 AM #8

I sold the 5600g and now have a 5800 available to test. I'll keep you updated if anything shifts.

RoyalUmbreon
Member

162

02-26-2026, 08:47 PM

I’m worried about the damage; it looks like the pin placement is off. It might not be a CPU problem, but checking the motherboard could help.

RoyalUmbreon

02-26-2026, 08:47 PM #9

I’m worried about the damage; it looks like the pin placement is off. It might not be a CPU problem, but checking the motherboard could help.