Toshiba U500-1CN (mainboard A1 INTEL MV DSC MAIN BOARD REV 2.3 no power on

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  • robgerr
    Senior Member
    • Apr 2012
    • 70
    • Italy

    #1

    Toshiba U500-1CN (mainboard A1 INTEL MV DSC MAIN BOARD REV 2.3 no power on

    Good day forum. I have this A1 INTEL MV DSC MAIN BOARD REV 2.3 motherboard that does not go into power on. I can not find any tension in the coils. I tried to reprogram a bios with a dump found on the net but nothing to do,
    I checked in the charger area and I realized that the acok signal does not come out of the charger. Here are the various measurements coming out of the charger isl88731:
    pin 2 3,68V
    pin 3 3,21v
    pin 4 0v
    pin 5 0,20v with oscillation
    pin 6 0v
    pin 7 NC
    pin 8 0v
    pin 9 0,11v
    pin 10 0,11v
    pin 11 0,11v
    pin 12 0v
    pin 13 0,11v
    pin 14 NC
    pin 15 4,0v and go down slow
    pin 16 NC
    pin 17 ,40 v
    pin 18 0,48v
    pin 19 0v
    pin 20 0v
    pin 21 5,11v
    pin 22 19,45 v
    pin 23 0,92v
    pin 24 1,11v
    pin 25 4,81v
    pin 26 5,07v
    pin 27 18,94v
    pin 28 18,94v

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