I have this compaq q2009 monitor 20' inches and I am having display issues. When I turn on the computer the image is displayed fine for a fraction of a second and then the display goes black. If I turn off the monitor and turn it on again the the same thing happens: the image is displayed for a fraction of a second and then goes black. This is odd. I've looked all over the web and I haven't found anything useful (not even in the HP website). So there is no "out of range" or "recommended resolution" message. It just displays and then goes black. I think the resolution is fine because it was working OK until recently and I haven't changed anything in that regard. Any help would be appreciated. Thanks.

1 Answer 1


OK to start with we have a Compaq Q2009 20" LCD Monitor (Product Specifications Here)

For my money I would say that it sounds like a backlight problem. There is a fairly thorough troubleshooting guide from HP for “A monitor is connected to the computer and has power but does not display anything” HERE. However another step that is not mentioned, that you may want to try first, is shining a flashlight into the monitor at an oblique angle. If you can see the normal screen but very dim your backlight/ballast is dead and the monitor will have to be repaired/replaced.

  • I saw this answer too late. And the monitor was already replaced. so I had no way to test this. Anyway, thanks for your help. +1
    – jasonco
    Jan 15, 2011 at 17:49

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .