Geez, now I feel guilty as I am having the same problem, but with a Dell 15" I bought from John the Junkman for $25. You think after using the monitor for 7 months with no other problems I got ripped off? I think I might try the soldering trick and if that doesn't work, the hammer trick and get my $25 back in frustration satisfaction.
with electronics it is about always soldering problems. you should consult a technicien or i advice u to take ur screw driver and open it. and have a careful visuale inspection. pay attention for not touching capacitors when the screen is off. touch the componants smothly and see if it is ok if so u have just to take ur soldering iron and solder.
Try using an external monitor to test it out. Your graphica card may need to be replaced or there is a ribbon cable connecting the display to the motherboard. Reseat the graphic card and chekc whether the cable is loose.
This article may be dead but this specific problem still exist and nobody has made a clear comment on the problem resolve. I have two HP L1710 monitors with the white screen problem arising after about twenty minutes of operation. I can push the auto-adjust and the monitor will work fine for about 20 seconds then does it again. Or, I can power it off and back on and it will last fine once again for about 20 seconds. Now after the monitor sits in the off mode for about a half hour, I turn it back on it will work fine for about 20 minutes and then start the whole ordeal all over again! Any comments about what is causing this problem?