Satellite C850-b820 - regularized disply

Hello.
I have toshiba satellite model pskcev core i7. windows 7 64-bit operating system.
It worked well until suddenly the disply becomes white, nothing can be seen, I restarted, the screen is black, nothing can be done even I restarted several times, isent it shop service said disply card needs to be changed, he replaced .no success three times, then he says that the motherboard on the disply additional card must be changed.now I could not find the appropriate motherboard.any comment or direct me where to find the motherboard will be highly appreciated.

Hello.
Sorry, it's to correct my typo to previous post mistake.
the series of satellites is c850-b820

Tags: Toshiba

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