HELP! backlight still dont work after screen replacement! - 8525, TyTN, MDA Vario II, JasJam General

hi, my 8525 screen's backlight doesnt work so i thought to fix this problem is to get a replacement screen. install the replacement screen today and still the backlight doesnt work!! can someone please help me!! i dont know what else to do!
heres a post i posted a few weeks ago
http://forum.xda-developers.com/showthread.php?t=323396&highlight=backlight

do you guys think its possible its the flex cable the is causing the backlight not to come on? is there auto thingy for the screen's backlight like the keyboard's backlight that automaticly turns it on? i'm stumped i don't know want to do... someone please help me..

no1 has no clue why my phone is doing this??

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Help
The flex cable is not attached correctly or the main board is broken and before you close your phone try it. If you can't do this give someone your phone and he will recover for you.
The problem is sloved. I dissasambled all phone and fix it once again and now it works. Anyway I got another problem of white screen on my second device. Did anybody find a solution for white screen ever????
wojcimierz said:
The problem is sloved. I dissasambled all phone and fix it once again and now it works. Anyway I got another problem of white screen on my second device. Did anybody find a solution for white screen ever????
Click to expand...
Click to collapse
Have you tried turning phone on with volume down button pressed???
You should see 4 colors. Try this. I search for you.
http://forum.xda-developers.com/showthread.php?t=2263026
try with this link.
Yes I have read this before but I think that white screen problem is not sloved in this thread. But maybe I could be wrong.

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