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Alienware 17 LA-9331P edp/lvds demux repair

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Hello ppl, an alienware 17 came to my hands with a problem with the LVDS EDP demux in bad condition, it shows video through the ports but not at the LCD. I wonder if any of you did repaired a motherboard with the same problem once ( or twice) and would give me some tips about what to check or wich smd components could have the guilty of the problem.

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Have you tried a different cable to the display?

Or are you sure thats a fault on the motherboard?

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