Damage lcd screen blank white can be caused by software and hardware, if the problems in the software live flashed hp will be normal, but if the hardware is that many causes ranging from the path of breaking the connector lcd to the driver, the driver lcd is also a lot of causes, and often also can of ic zokus, here will give me a bit of the problems that often occur.
First check that you are on track, see figure DOWN,
Lack of good image above is the path of the connector lcd lcd (X2450) to ic lcd Z2450 and Z2451, check line at the top jumper if broken,
The characteristics of the white defective lcd lcd ic ....
usually when HP YOU ON lcd flame, logo nokia phone out and died instantly, while HP has been in frequent contact flash.Ini is ic lcd X2450 and X in 2451, then you do blow out and shake the LCD ic, BUT CLOSE FIRST (D2800 ) let me not too hot because this ic if it's too hot can make hp dead, now worse .... you know? if you are already in the blow but still white, you try to replace it with a new ic.
mages are circled in red in the above are problems that often occur when a white blank lcd screen