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In my hp 4540s Probook laptop sometimes the screen backlight does not turn on. But pictures are there on the screen when i see it from different angles. And external monitors work fine. This happens when, *the display goes to sleep and come back again later, the backlight does not turn on *starting the computer (when powering up, the backlight is already not there) (in both the above cases pictures are there on the screen without the backlight) When this happens, i can get the backlight by moving a magnet several times near the right speaker of the laptop (where the lid switch sensor is, as i know).
mine has a problem of displaying on screen and it started well but still black screen it has windows 8 with intel core i3, may you help me about it please.
