Power outage reported, no further updates available.
Power outage reported, no further updates available.
Yesterday we experienced an 18 second power interruption (I checked the report). At that moment, I was using the PC, which had been running for four months without any problems. Now it fails to complete the POST. On the MB, the red CPU LED flashes for a split system, then the amber DRAM LED lights up for about ten seconds, and then it flashes red and amber again for ten seconds. This cycle keeps happening continuously. I've tried all standard troubleshooting steps like reseating the RAM, swapping in different slots, trying another stick, removing the GTX, disconnecting peripherals, and clearing the BIOS each time. No improvement. I don't have access to other RAM for testing. Should I replace the MB or the RAM?
The AIO turns on with lights and fans, GTX 3080 and fans too, and even the MB lights up. I didn't think the PSU was the problem since it's only four months old.
I don't have enough details to determine the exact motherboard and PSU. Could you provide more information or specifications?
Yeah, sorry.
Mobo: Asus TUF Gaming B760-Plus WiFi model with I7-14700KF processor, RTX 3080 12GB triple GPU, 32GB TForce 5600 DDR5 RAM, and Corsair SF850L power supply.
The component's age doesn't always mean anything. Use a multimeter or get a backup PSU to check the voltage.
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.
I took the son-in-law's PSU and only connected the MB. Identical outcome.
Changed the RAM modules and experimented with various slots, re-flashing CMOS each time.
Still a fast CPU response, the 10 seconds of DRAM flashing, then everything returned.
Could it be that the MB named Tuf Gaming suffers damage following its initial power failure?
It's a bit uncertain, but have you verified that the 24-pin ATX connector was correctly connected? A similar incident occurred recently. A strong lightning strike nearby caused power to drop for hours... After it resumed, the PC didn't show any activity at all. It would only briefly respond after pressing the power button before shutting down completely (the RGB lights flashed for a moment). I replaced the PSU with two working units, but nothing changed. I also swapped out the RAM with other parts I had, yet no improvement. Even removing the motherboard from its case, as I was getting frantic, there was still no connection. It seemed the power cable wasn't properly plugged in.
Just when I was ready to give up and send the whole system to repair, I reinserted everything and felt the "click" when the 24-pin cable connected. The PC booted up immediately without issues. I tested other PSUs as well, but again, the connector wasn't inserted correctly every time—still, the PC functioned normally with the same PSU.
My previous discussion about this might still exist somewhere. I think it's worth giving another attempt...