I've been dealing with intermittent monitor disconnects for almost a year. The PC is about a year and a half old, and I've already spent around $200 having it inspected and rearranged for better airflow and performance. The repair shop couldn't reproduce the problem. I also replaced all of the display and power cables recently, which seemed to help for about a month, but the issue has returned and is now happening repeatedly.
It often occurs while recording Minecraft with shaders, forcing me to stop and restart the computer. On several occasions, the display disconnected immediately after entering my password, and once it happened before the login screen even appeared. The PC also shut off immediately after I closed Minecraft one night. I'm not sure whether the monitor loses signal while the computer continues running or whether the entire system is crashing. My system has a Ryzen 9 7900X, B650 Eagle AX motherboard, 32 GB of RAM, and an RTX 3070. I don't currently remember the power supply model or wattage. What should I test next?
2 Answers
You can try running `sfc /scannow` because repeated forced shutdowns can damage Windows system files. If the system freezes but remains powered on, pressing Ctrl+Shift+Win+B will restart the graphics driver. If that brings the display back, a graphics driver problem is possible, although a failing GPU can cause similar behavior.
This sounds more like a computer problem than a monitor problem. The power supply would be one of my first suspects, especially since it seems more likely to happen during heavier GPU use with Minecraft shaders. An unstable PSU can cause black screens, sudden shutdowns, or restarts.
Check the GPU’s power cables and seating, monitor CPU and GPU temperatures, test the RAM with XMP or EXPO disabled, and review the BIOS settings. The most useful detail is what happens when the screen goes black: if the fans, lights, or audio continue, the GPU or its driver becomes more likely; if the whole system powers off or reboots, the PSU or another hardware issue is more suspicious. Find the exact PSU model and wattage before replacing anything.
I’ve already tried the software troubleshooting suggestions, including advice from an AI tool. They seemed to have an effect before the monitor disconnected, but they didn’t help once the problem actually occurred.