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ACER Aspire 7 Black Screen

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    ACER Aspire 7 Black Screen

    hello,

    model ACER Aspire 7 A715-72G-55Y5
    board number DH5VF LA-F951P

    Laptop worked fine for 2 months, after keyboard is replaced worked few more days and than black screen with fan on for couple of seconds then fan stops.
    Blue light(power ON) is working all the time, Orange light(Battery) also working.
    Tried battery reset, BIOS flash with original BIN file, new ram, nothing changed.
    I opened laptop and start measuring.
    Noticed that there is no voltage on coils around procesor, only 1.1v on one coil, 5 more coils show no voltage.
    Coils near GPU also shows no voltage.

    anyone can direct me what to do?
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