Jump to content
Corsair Community

PC died after power outage

Go to solution Solved by c-attack,

Recommended Posts

Hello Corsair Community,

A couple of days ago, whilst I was gaming, the power in my house started flickering then eventually died.

My PC is powered by a sine wave UPS which is in good working condition, however my monitors aren't, so when the power died to the house, I shut off my PC by long holding the power button, then powered off the UPS.

When power to my house returned, about 22 hours later, I turned on my UPS and then my PC, but my PC did not start.

When I power on my PC, the fans will spin up for a brief second, only to then stop. Then the RGB lights on my RAM turn on, and that is how it stays. No matter what I remove or swap, the symptoms do not change.

I've uploaded a short video demonstrating the issue HERE.


As part of my troubleshooting so far, I have pulled all the RAM (and plugged one DIMM back into different slot), GPU and reseated all connections (I haven't done CPU yet).

I have also disconnected all the power cables, jumped pins 16-17 and turned the PSU on. The fan on the PSU spun for about half a second and then stopped, however I have not yet performed multimeter testing.

Also, I briefly checked the motherboard for a blown capacitor, but I couldn't see anything.

At this point I'm leaning towards the issue being the motherboard (MSI MEG x570 ACE), but it could also be the PSU (Corsair AX860i) or the CPU (Ryzen 9 5950x).

If anyone could provide advice  (unfortunately I don't have spare parts), that would be extremely helpful. I use my PC as my primary work machine, so I really need help deciding what to replace first.

I appreciate any help that can be provided!


Link to comment
Share on other sites

  • Solution

Assuming the power event is the cause of things, start working backward from the wall.  Connect the PSU straight to the wall to bypass the UPS to see if it took the blow (as it should).  Assuming no change, the PSU is the most likely problem and technically that is what should happen if there is a big current rush.  I've had this happen before with a massive power surge into the house, the UPS somehow survives and the PSU gets knocked out as the secondary protector of MB, GPU, CPU.  If it didn't want to turn on when on the jumper, that suggests there may be an issue.  


Unfortunately, PSU troubleshooting tips tend to be less than helpful.  Most start with "get your other PSU out see if this resolves the issue.".  Most people aren't going to have a backup and rewiring the system is no fun either.  However, working the motherboard or CPU angle is going to be worse.  Start a support ticket with Corsair now with the focus on the PSU.  In the meantime, you might check out any readily available PSUs at stores with friendly return policies -- in case it is no longer needed.  

Edited by c-attack
Link to comment
Share on other sites

Thank you for your reply!

I did already try plugging it straight into the wall (I apologize for not mentioning it in my original post).

The reason I was unsure about the PSU being damaged, is due to this note on Corsair PSU testing, which sounds a lot like what my PSU is doing:

  • NOTE: Many Corsair PSUs have a zero-RPM feature that results in the fan only spinning for a moment after the PSU is powered on. This still indicates that the PSU is functioning normally.

However, thanks to your reply I've gone ahead and ordered an HX1000 PSU with same day delivery from Amazon.

If that resolves the issue I'll go ahead and start an RMA on my over 6 year old AX860i, thankfully there's still 6 months left on the warranty 🙂

Link to comment
Share on other sites

Great news! It turns out that the PSU was the cause.

It's all back to normal now with the HX1000 installed.

I'll go ahead and submit a ticket for the AX860i.

  • Like 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...