AVCS275

joined 1 year ago
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Supermicro PSU yellow light on battery power? in c/homelab@selfhosted.forum
[–] AVCS275@alien.top 1 points 11 months ago (1 children)

Yeah it kills the server. The one on battery doesn't sustain anything. The UPS is not giving any backup power for black/brown outs for that particular server regardless now.

Is this really just PSU? Or it's tied into the MB somehow?

Supermicro PSU yellow light on battery power? in c/homelab@selfhosted.forum
[–] AVCS275@alien.top 1 points 11 months ago (3 children)

Both PSU do the same though. It's not specifically one of them. Whichever ups I put on battery, the PSU will act like it's not getting power.

Supermicro PSU yellow light on battery power? in c/homelab@selfhosted.forum
[–] AVCS275@alien.top 1 points 11 months ago (5 children)

Simulated sine wave. The weird thing is my 2 other supermicro servers on those UPS don't have that issue, it's just this one.

The alarm is normal, if you unplug 1 PSU it warns that something is wrong. But it shouldn't do that on UPS battery. Server keeps running because other PSU supplies power to server.

1
Supermicro PSU yellow light on battery power? (alien.top)
 

This is a weird thing I have happening on one of my servers, these have been running nearly 7-8 years but I recently swapped a new MB/CPU etc in a server. IT's SC836 dual redundant PSU.

So both PSU are plugged in it's own UPS. When I pull the plug from the wall, the PSU that's on battery will go yellow and scream loud alarm. Mind you other servers are connected to this UPS getting battery powered AC. Only this server does this. I tried it with both PSU and both do the same thing. Is something wrong with the chassis PDU/PMBUS or something else like MB/ram/CPU?