white screen problem in w850

[deeplover1]

Your problem seems to be with the hardware like flexible ribbon or frontboard yet you may try flashing the phone. Read the first tutorial given by StVRay, if your phone has CID53 then you'll need far+jdflasherCID53 and if CID52, setool2lite will do the job

1 month ago, i restart my phone and two icons from the main manu are hide. that was music icon and phone book icon. and after few days i change the phone cassing fully. and phone works properly except two icons. after three days i was lisnting the music through handfree and phone automatically restart. after restart phone can't turn on. white screen, black sceeen, white screen, black screen..
first white screen held 3 sec. and first black screen 4 sec. iwas think that the hardware problem. i have change the sliding strip, LCD, and frount panal keys but my phone have still white screen... u have any other idea.??