Brand new PSU dead in 3 weeks?
Brand new PSU dead in 3 weeks?
New build completed. Corsair 850 shift PSU, Asus TUF Z790 mobo, I7 13700K CPU. It worked perfectly until this morning. Now it won’t power on at all. The only indication of life is the Ethernet port light flickering. Tested power switch on the mobo by shorting connections, but nothing happened. No other lights on the mobo. All wires to the 24-pin connection are black, so I haven’t tried the paperclip test yet, but might consider it later.
Is it possible the PSU is supplying enough power to the mobo that the Ethernet port flickers, but not enough to start the PC?
My daughter is devastated and believes she did something wrong, even though I reassured her it wasn’t her fault.
I selected the Corsair Shift because it simplifies wiring, but now... well.
Good you got it working.
Since you removed the plug, I think the RAM might not have been properly installed.
There could be some CR2032 lithium batteries with a longer lifespan, but I’m not sure if that matters.
The batteries only lose power when the electricity source is disconnected from the wall, and even then it will take a while.
Besides the CPU and motherboard, what else did the system power up? It could be that the board doesn't want to power up. You could try and reseat all connections on the motherboard and see if any were half way in. You could also try and clear the CMOS or reseat the ram on the board.
As this is a thread of troubleshooting nature, please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
The "paper clip" test is not useful.
It only verifies a dead power supply unit but gives no indication of proper functioning.
Nonetheless, it's still worth attempting.
Was the power supply equipped with a tester plug?
Make sure each cable end is completely inserted.
Occasionally, components may fail, especially during the initial weeks.
Corsair offers 24/7 customer support—don't hesitate to use it.
Every electronic part has a chance to fail, but nothing unexpected is happening here. It's important your daughter knows this. That's what a warranty covers. If the system doesn't start, the most likely causes are the power supply and motherboard. Be sure to test the power supply with a paperclip to help identify the issue.
I attempted the paper clip test, and everything appeared to function... since I didn't disconnect anything except the 24-pin connector, the fans all came on except the one connected to Mobo, with others working off a SATA plug. I plan to reinsert the DDR and possibly replace the 2032 battery (if I can locate it, probably below the GPU).
The cr2032 battery is solely for maintaining non-default bios configurations during complete disconnection of the power supply from the wall. It is probably not applicable. Contact Corsair, available 24/7, they will guide you through necessary tests if needed for a replacement.
Fixed! I removed the battery, waited half a minute, and plugged it back in. She started immediately. I had to enter BIOS (EUFI) and adjust some settings—XMP needed to be turned on since I also replaced the RAM—but everything is back to normal!
Why do I need to reset the CMOS? Could it have been a power surge overnight that only affected one PC? Should I replace the 2032? It’s a brand new motherboard, so I think the battery is fine. Would a 2032 battery work? I saw somewhere that there might be differences between PC 2032 batteries, but I’m not sure.
You managed to get it working.
Given that you removed the plug, it's likely the connection wasn't fully secured.
There might be some CR2032 lithium batteries with a longer lifespan, but I think that's not important here.
The batteries only lose power when the electricity source is disconnected from the wall, and even then it happens slowly.