Попробуй это мне помогало:

Hello All VenusBox And Ufs3 Users ...
I successed To Repair Samsung X820 white screen after flash

1- use Ufs3 inside Venus Or Separated ( sams prog)
2-choose x800 and cable d800 ( available in package with venus box)
3- flash phon With this flash File
http://www.venus-box.com/venus_updat...nus%20team.rar
4-after flash ur phon restart and blinking in O2 screen
5-to resolve restart and blinking u flash the phone This Flash File
PRESS HERE TO DOWNLOAD FLASH FILE 2
http://www.venus-box.com/venus_updat...20team%202.rar
br
(venus Team )
( Mostafa Sobhy )

Взято тут: http://forum.gsmhosting.com/vbb/showthread.php?t=423443