Question Power outage, now no POST ?

[Champs17]

Last night we had an 18 second power outage (I looked up the outage report). I was using the PC at the time, and it had been running for 4 months without issue.

Now it won't complete POST. On the MB, the red CPU LED flashes for a split system, then the Amber DRAM LED comes on for about 10 seconds, then flashes red and amber again for 10 seconds. This repeats continuously.

I have done all the usual troubleshooting like reseated the RAM. Tried one, then the other RAM stick in different slots, No RAM. Removed the GTX, all peripherals, cleared bios each time. No change.

I don't have access to other RAM to test.

Do I buy new MB or new RAM?

 

[dwd999]

Only if you're sure its not the power supply.

 

[Champs17]

Only if you're sure its not the power supply.

AIO Cooler lights up and fans spinning. GTX 3080 lights up and fans. Even the MB lights up. Didn't consider the PSU could be the issue as It's only 4 months old.

 

[helpstar]

which motherboard and PSU is it exactly?

 

[Champs17]

Yeah, sorry.

Mobo: Asus TUF Gaming B760-Plus WiFi
CPU: I7-14700KF
GPU: RTX 3080 12GB Triple
RAM: 32GB TForce 5600 DDR5
PSU: Corsair SF850L

 

[DaleH]

AIO Cooler lights up and fans spinning. GTX 3080 lights up and fans. Even the MB lights up. Didn't consider the PSU could be the issue as It's only 4 months old.

The age of a component isn't necessarily indicative of anything. Measure the voltage with a multimeter or borrow a spare PSU.

 

[dwd999]

AIO Cooler lights up and fans spinning. GTX 3080 lights up and fans. Even the MB lights up. Didn't consider the PSU could be the issue as It's only 4 months old.

Its not the power dropping out; its the power coming back on. If there's a momentary surge when the power comes back on that could damage the power supply, similar to a lightning strike. That's why its prudent to have the power supply connected to a surge protector with the highest joule rate possible or a UPS with a high joule rate.