1. Check the Monitor: Start by making sure your monitor is functioning properly. Power cycle the monitor by unplugging it for a minute, then plugging it back in. If that does not work, try connecting another device to the same port and make sure there is video output from that device. Make sure all of your cables are firmly seated and that none of them are loose.
2. Check the Video Card: If the monitor appears to be functioning properly, the next step is to make sure the video card is working correctly. Open the case and inspect the video card for visible signs of damage such as burns, bulging capacitors, corroded contacts, or broken components.
Reseat the video card’s power and data cables. If you see smoke or sparks, stop and immediately unplug the system.
3. Update Drivers: If the video card appears to be functioning correctly, you should make sure you have the latest version of the device drivers installed. Check the manufacturer’s website for the latest available versions and download and install them. If this doesn’t help, then you may want to consider rolling back to an older version of the driver.
4. Test the Memory: If the display is still having problems, you should check the system memory. Run a memory diagnostic test to make sure all of the RAM is functioning properly.
5. Test the Hard Drive: If the memory checks out okay, then a hard drive problem could be the issue. Run a hard drive diagnostic test to make sure your hard drive is functioning properly and that there is nothing wrong with the data stored on it.
6. Reset the CMOS: If all else fails, you can try resetting the system’s BIOS settings. This can sometimes fix display issues. To do this, locate the battery on the motherboard and remove it for a few minutes. Then put it back and see if the display issue is resolved.
7. Repair Windows: If none of the above steps work, you may need to repair the Windows installation. Boot from the Windows installation disc, then follow the prompts to repair the operating system.
8. Replace Parts: If all else fails, you may need to replace some parts. This could mean replacing the video card, memory, hard drive, or even the entire computer motherboard. If in doubt, consult a professional to help diagnose the problem and determine the best course of action.