No POST, no ARGB either

GeX

GeX

GeX

Soldato
Joined
17 Dec 2002
Posts
6,937
Location
Manchester
I have a system that has been working great since Christmas Day, but this week after letting it sleep - it now won't wake up.

It won't POST. The monitor wakes, and goes back to sleep due to no signal. It cannot be powered off by holding the power button.
The fans spin, but the ARGB on the case fans (and RAM) does not light. There are no debug LEDs, but this board is known for quick memory training and it has been left for plenty long enough for that to happen. Also, ime - when training, the ARGB would be on.

The RGB on the CPU fan is lit up, and I can't remember if I connected that to the mainboard's ARGB or that's just connected via USB.

Cleared the CMOS, checked power connections on the board. I can't think what else to check before stipping it down and testing parts on their own in other systems.

Spec is

Gigabyte B650M GAMING X AX
Ryzen 7950X3D
RX7800 XT
Kingston FURY Beast EXPO RGB 16GB (2x8GB) DDR5 PC5-48000C30 6000MHz
be quiet! SYSTEM POWER 10 750W 80 Plus Bronze

To me, it smells like the mainboard has failed else why isn't the RAM lighting up.

Has anyone seen similar before, and can advise?
 
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Have you tried removing the GPU and using the IGPU?

Also tried with 1 stick of ram and removing the other and then swapping over if still no joy?
 
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It's worth pulling the memory and try one stick at a time in each slot , there could also be a short so it's worth disconnecting any non essential cables.

Otherwise it's motherboard out and test.
 
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mickyflinn said:
It's worth pulling the memory and try one stick at a time in each slot , there could also be a short so it's worth disconnecting any non essential cables.

Otherwise it's motherboard out and test.
Click to expand...
seems to be happening a lot recently with posts of systems not booting and looking like the motherboard is dead
 
but it's usually bent pins, which this one can't really be...We hope.

Can't offer much if you're not near the machine, RAM in different slots or a different set is a good one. Unplug everything not needed and try again.

The power button thing jumps out at me as strange, try unplugging that and jumping it with a screwdriver ?
 
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It works to power it on, just not off. Which to me is indicative of a hardware problem but I spent more time debugging PCs 20 odd years ago
 
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