How to Troubleshoot Display Issues on a PC
Display problems like “no signal” messages, black screens, and visual glitches can be frustrating. This guide walks you through the most effective ways to diagnose and fix common display problems.
No Signal or No Display Output
- Check Display Cable Connections: Make sure your HDMI/DisplayPort is securely connected to the graphics card (not motherboard).
- Reseat the Graphics Card: Power off, unplug the PC, remove the GPU, and reinsert.
- Try a Different PCIe Slot: If available, test a second slot.
- Test and Reseat RAM: Reinstall RAM or test one stick at a time.
- Connect Directly to a Wall Outlet: Avoid power strips while testing.
- Reset BIOS Settings (Clear CMOS): Remove the CMOS battery for 15–20 minutes, then reinsert.
Random Black Screens During Use
- Update Graphics Drivers: Get the latest from your GPU manufacturer's site.
- Review Power Settings: Ensure your system isn’t set to turn off the display too quickly.
- Confirm Monitor Input Settings: Use your monitor’s menu to choose the correct input.
Visual Glitches or Artifacting
- Reinstall Graphics Drivers: Use a tool like DDU to remove old drivers before reinstalling.
- Reseat Components: Ensure your GPU and RAM are fully seated.
Other Helpful Checks
- Look for diagnostic LEDs on your motherboard (e.g., CPU, DRAM, VGA).
- Consider updating your BIOS if you're comfortable with the process.
Still stuck? Visit our Support Page for personalized assistance and more troubleshooting resources.