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[ The PC Guide | Troubleshooting and Repair Guide | The Troubleshooting Expert | Troubleshooting Specific Components | Troubleshooting Monitors | Failure or Improper Operation ]

There appears to be a problem with the signal connection between the video card in the PC and the monitor

Explanation: There appears to be no signal from the video card to the monitor. There is no display on the monitor or there is only a blank white screen.

Diagnosis: There are several possible causes, often involving a problem with the cable to the monitor.


  • Make sure that the monitor is plugged in and turned on. Check for a power-on indicator on the front of the monitor. If the light isn't on, or the monitor is not working properly, troubleshoot the monitor here.
  • Check the connection between the video card and monitor. Make sure the cable is connected securely on both ends and is not loose. Make sure that the cable has not become stretched or kinked.
  • Make sure that the PC is on and running. LEDs should be lit on the front of the case and you should hear the whirring of fans and disk drives coming from the box.
  • Your video card may not be producing any output due to a problem of some sort, especially with a newly-built or newly-upgraded system. Try connecting the monitor to another PC if possible. If it works on the second PC, the monitor is fine and you should troubleshoot the video card here.

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