I'm having an issue where my PC display randomly drops out. Initially, I thought it might be overheating, but when I streamed HWMonitor to a friend during one of these freezes, we didn't notice anything unusual with the hardware. I replaced my motherboard back in December 2025 because something burned out, but I can't recall the details. I brought it to a repair shop where they found multiple potential issues: GPU output instability leading to no video signal, power supply irregularities affecting startup, memory seating issues, and some BIOS configuration problems. They suggested the main culprit might be the power management IC on the motherboard, which regulates power to critical parts like the GPU and RAM. They offered to repair it but I'm looking for a second opinion since I have a Gigabyte Z390 motherboard, a GeForce RTX 2070 Super, and a Thermaltake 750W power supply. Any ideas before I commit to repairs?
2 Answers
It sounds like the PMIC might be the issue, but that's pretty uncommon. Before you go and replace the motherboard again, there are some troubleshooting steps you can try at home. First, if you can, swap out your power supply with another one. That might solve the problem. Also, since they mentioned RAM issues, I'd recommend using the Windows Memory Diagnostic Tool to check for errors. If you see any, try reseating the RAM sticks, and if that doesn’t help, test each stick individually in different slots.
Resetting the BIOS might also help. Unplug your PC, take out the CMOS battery, hold the power button for about 15 seconds, wait a few minutes, then put the battery back. Once you start it up, disable XMP in the BIOS to check for stability. If things still aren't working right, you might want to get a second opinion from a different repair shop since the first one sounded a bit over the top with their assessments.
Absolutely, getting a second opinion is always a smart move. It's strange for so many components to be failing at once, so it's worth checking if your current shop might be jumping to conclusions.
That's some solid advice! Another thing to consider is stress testing your GPU with benchmark tools. If the system crashes or the display goes black, the GPU might be the culprit.