Posted 29 May 2012 - 03:05 PM
The White screen problem you are seeing is possibly dueto a dying controller located on the LED screen its self Since you havereseated the video cable and made sure the connections are secure and thelaptop is still exhibiting the problem it leads me to believe the display itsself has suffered a failure at this point I would recommend a replacementscreen.
Larry D. Lawrence II
MCSE, MCP,ACMT, ACTC
Dell, HP, Toshiba, Apple, Lenovo, and IBM Certified Technician