PC fails to power on completely, with no fans or lights except for a single motherboard indicator.

V

Variiox
Member

180

12-10-2022, 08:52 PM

#1

I recently began assembling a PC and couldn't get it to power on except for the motherboard's ROG logo. I initially used a Gigabyte X570-Aorus Elite, which wouldn't turn on until we reset the CMOS. After that, I powered off the system and installed new fans and an AIO. When I tried to boot again, nothing appeared at all—no lights or fans. I went through many fixes: updating the BIOS, using just one RAM stick, switching to a different power supply that worked. I returned the motherboard and got a new one from Micro Center. Back home, I used this board but only saw the motherboard indicator and nothing else. I also attempted a BIOS flash, RAM tweaks, and GPU removal, but nothing resolved the issue. I’m starting to suspect either a faulty motherboard or a defective CPU (though I checked for broken pins). Here’s the current setup: Ryzen 5 5600 (new), ROG Strix B550-F Gaming (open box from Micro Center), 32GB G.Skill Ripjaws V DDR4-3200 (open box from Micro Center), Radeon RX 6600XT (open box from Micro Center), EVGA 280mm AIO (new), and a 750W semi-modular PSU (open box from Micro Center). I’ve gone through all the troubleshooting steps mentioned in the forum post.

T

The_D3mon
Senior Member

694

12-14-2022, 06:54 AM

#2

The power supply unit might be faulty.

T

thethunderthor
Member

65

12-20-2022, 02:18 AM

#3

I verified it with a voltmeter and the paperclip bridge technique, plus I connected a Corsair 750W power supply that I’m certain functions correctly on this machine.

P

PGVortex
Member

146

12-20-2022, 03:19 AM

#4

If the system doesn't power on with that Corsair adapter, consider a BIOS update or issues with the board, CPU, or GPU. First verify the front panel I/O header connections. It's a common oversight. If confirmed, test the new GPU and CPU on another board to identify the problem. Updated July 7, 2022 by An0maly_76

A

AnttoZz
Member

179

12-20-2022, 11:31 AM

#5

It was what I expected, I attempted to refresh the bios but it failed. Now I plan to try the GPU next.

A

Antag99
Junior Member

17

12-20-2022, 12:39 PM

#6

It seems you might have meant to remove the CPU for the BIOS update, but I'm not entirely sure if that's necessary.

W

whitefang36
Junior Member

24

12-20-2022, 08:30 PM

#7

I completed the first one using just the CPU without RAM or GPU. Now I’m planning to try it without a CPU next.

S

SOCRATOON
Junior Member

49

12-20-2022, 09:05 PM

#8

CPU ought to have displayed a RAM or GPU indicator when neither was present.

P

PersieO
Posting Freak

786

12-21-2022, 05:40 AM

#9

Before or after I pressed the power button? The only light I noticed was the motherboard indicator, and nothing changed when I pressed the power button or used a screwdriver to short the power connectors.

M

misterkaboom9
Junior Member

3

12-21-2022, 07:26 AM

#10

Of course, which motherboard light are you talking about? Typically there are several diagnostic indicators, such as CPU, RAM, VGA, and boot status, but this model might vary from what I'm familiar with.