iphone 3gs wsod. Should i sell it?

i got wsod after replaced panel. phone doesn't shows apple boot logo.
itunes detects phone. can't see 2gb mass storage area of phone when connect phone pc ( normal? please answer that).

here list of methods have tried fix phone.
1) updated 3.1.3 5.0.1 , jailbroken it.
2) removed parts (including logic board) , reassembled it.
3) tried dfu , recovery modes nothing worked.

when try put songs or games on using 91pc suite got error btw no errors when tried put photos on it.

thinking selling phone because don't feel it's screen think logic board dead. there else can try.
how can confirm it's problem of logic board.
because don't wanna sell phone if screen.
idea???

 

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