F5F Stay Refreshed Hardware Desktop Question Red VGA light on motherboard following PSU failure?

Question Red VGA light on motherboard following PSU failure?

Question Red VGA light on motherboard following PSU failure?

C
ChaosRidda
Junior Member
2
01-06-2026, 08:07 PM
#1
Hello,
Yesterday while playing games, my PC shut down unexpectedly. I restarted it but nothing worked—no lights, just silence. I thought it was a bad power supply. After replacing it with a new one, I turned it on again and managed to boot. Now the RAM and motherboard lights are on, but the air intake fans and CPU cooler are not spinning. There’s also a red VGA light on the motherboard, and my monitor isn’t showing any signal. What might be wrong? Could the GPU be dead? I’ve tried reinstalling it, changing the PCIe slot, and reconnecting cables, but still no improvement. I’m new to building PCs and feel lost.

What should I do?
C
ChaosRidda
01-06-2026, 08:07 PM #1

Hello,
Yesterday while playing games, my PC shut down unexpectedly. I restarted it but nothing worked—no lights, just silence. I thought it was a bad power supply. After replacing it with a new one, I turned it on again and managed to boot. Now the RAM and motherboard lights are on, but the air intake fans and CPU cooler are not spinning. There’s also a red VGA light on the motherboard, and my monitor isn’t showing any signal. What might be wrong? Could the GPU be dead? I’ve tried reinstalling it, changing the PCIe slot, and reconnecting cables, but still no improvement. I’m new to building PCs and feel lost.

What should I do?

E
Eppikx
Senior Member
447
01-16-2026, 06:01 PM
#2
This PSU?
https://www.bequiet.com/en/powersupply/4166
Did you rely solely on the cables included with the new PSU?
E
Eppikx
01-16-2026, 06:01 PM #2

This PSU?
https://www.bequiet.com/en/powersupply/4166
Did you rely solely on the cables included with the new PSU?

M
MeltedCarmel
Junior Member
9
01-16-2026, 07:19 PM
#3
Did you diagnose the issue?
M
MeltedCarmel
01-16-2026, 07:19 PM #3

Did you diagnose the issue?