PC Powers On but Shows No Display After a Windows Update
Asked by
MellowPine42
My PC was working normally until I shut it down after a Windows update. The next day, it powered on and sounded like it was booting, with the CPU and GPU fans spinning, but neither monitor showed an image. I tried reseating the RAM and graphics card, removing and reinstalling the CMOS battery, and connecting HDMI directly to the motherboard with the GPU removed. I also tested both monitors separately, and they work with other devices. What should I check next to determine whether the problem is the motherboard, power supply, RAM, graphics card, or something else?
Answers
Check the motherboard’s built-in diagnostics. Depending on the model, it may have a two-digit display, status LEDs, or support for a small PC speaker connected to the front-panel speaker header. The motherboard manual should explain the beep codes or LED patterns. With the RAM removed, a functioning board should normally report a memory error somehow. If there’s no diagnostic response at all, the motherboard or power supply becomes more suspect, although the exact cause is difficult to confirm without testing individual components.
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MellowPine42: My board uses a small speaker, which I didn’t have connected, so I ordered one and will test the diagnostic codes when it arrives.
MellowPine42: With the RAM installed there was no beep. After removing it, I got one long beep followed by two short beeps repeating. Does that indicate the motherboard is working, or does it point to another component?