I recently moved into a college dorm and transported my PC and three 27-inch monitors. The two side displays are 1080p, while the center monitor is 4K. Everything was packed with plenty of bubble wrap and blankets, and I removed the graphics card from the tower during the trip. After setting everything back up, Windows recognizes the center monitor, and its power indicator is blue, but the screen remains completely black. I have restarted the computer and tried different ports on the graphics card. The monitor's on-screen menu also will not appear. I tested multiple DisplayPort and HDMI cables, including a brand-new cable, but the result was the same. What else should I check to determine whether this is an input problem, a graphics-card issue, or damage to the monitor itself?
2 Answers
If the monitor’s own menu does not appear, even when no video cable is connected, that points more toward the monitor itself than Windows or the graphics card. Disconnect the video cable, power-cycle the display, and try opening its built-in menu or input selector. If the menu still never appears, the panel electronics or internal connection may have been damaged during transport.
First check the simple things: confirm the monitor is set to the correct input, reseat the graphics card and its power connectors, and try the monitor with a different device if possible. You can also press Ctrl+Shift+Windows+B to restart the graphics driver. Since Windows detects the display, the GPU may still be communicating with it, but that does not completely rule out a connection or hardware problem.
The other monitor connected to the dedicated GPU works normally, so the card seems to be seated and powered. I also tried several ports and cables, but the center display is still black.
A blue power light only confirms that the monitor is receiving power; it does not mean the panel or internal controller is working. Testing it with another computer or console would be the best final check before considering repair or replacement.