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Common LCD Display Problems with Possible Solutions

Posted by JD on October 2, 2009

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Laptops are notorious for having issues with their displays. Let’s take a look at some of the common display problems and possible solutions.

The backlight on my LCD lights up, but the screen looks blank. Sometimes when I press on the corner, I see some images.

This problem isn’t related to the inverter. If your display lights up-even without images-this means that the backlight lamp and inverter board are still working. Probably this is a failure in some of the connections on your screen controller board. A less likely cause could be a loose video connector on the back of your display.

My screen is a flickering rainbow all the time. I need to see my work, not a light show. (Everything looks fine on an external monitor.)

If the external video output works fine, then you have eliminated software, your video card and your motherboard as the cause. Otherwise, your external monitor would be garbled too. Possible causes for this colorful symptom include a faulty video cable, a loose video cable, a defective LCD panel, or a loose video card.

My screen randomly goes blank, usually when I use certain programs. The backlight is still on and an external monitor works fine.

Here’s what to try. Start with making sure you have the latest BIOS version for your laptop motherboard. You can find out by checking your manufacturer’s website. If that doesn’t fix your intermittent video problem, check the video cable connection both at the motherboard and the back of your LCD. If reconnecting or reseating this cable doesn’t work, the cable or your LCD is probably failing.

My display is a blank white screen. I replaced it and it is still blank white. External monitor is working OK.

When you replaced your LCD panel, did you replace the video cable too? If so, then you probably have some issue with your graphics card. Since this is probably integrated with the motherboard, it may be time to think about a new laptop.