Acer Aspire 5 A515-57 HH5A4 LA-M211P rev 1A no video black screen

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  • keruter
    New Member
    • Mar 2020
    • 6
    • POLAND
    #1

    Acer Aspire 5 A515-57 HH5A4 LA-M211P rev 1A no video black screen

    Hello,
    Acer Aspire 5 A515-57 HH5A4 LA-M211P rev 1A
    CPU: SRLFQ i5-1235U
    KBC: KB9052QD

    The laptop boots without displaying a picture on either the display or the external screen. After resetting the CMOS, the board restarts twice, current flows, and then the board randomly stops at 0.887A or 0.999A. The battery charges.

    PLB2 - 1,2 MΩ and growing
    PLG4 - 15 Ω
    PLZ1 - 8 Ω
    PLZ2 - 8 Ω
    PLA01 - 15 Ω
    PL1801 - 2 kΩ
    PL501 - 1,5 kΩ
    PLM2 - 62 Ω
    PL301 - 1,5 kΩ


    After turn on

    PLB2 - 225 mV
    PLG4 - 0V
    PLZ1 - 1.1V
    PLZ2 - 1.1V
    PLA01 - 1,8V
    PL1801 - 1,8V
    PL501 - 5V
    PLM2 - 1,2V
    PL301 - 3,3V

    I'll also add that practically the motherboard itself boots without any additional accessories. The RAM is tested and working. The BIOS and KBC firmware have been reprogrammed.​
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