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Dell 15R 5537 (LA-9981P) No power

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    [LV.10]以坛为家III

    发表于 2016-11-21 14:05:56 | 显示全部楼层 |阅读模式
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    Hi all,
    I have dell 5537 la-9981p which have no power problem and B+ supply is 0.83V.
    There is no B+ supply generating from PU701 BQ717. I have replaced BQ717 but still there is no change in situation.
    Here is supply of BQ717.
    PIN 4 ACDRV = 19V
    PIN 6 ACDET = 2.5V
    PIN 5 AC OK = 3.5V
    PIN 20 VCC = 19V.
    B+ SUPPPLY is only 0.83V.
    kindly help me to solve the problem.
    Thanks

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    [LV.8]以坛为家I

    发表于 2017-1-9 00:30:51 | 显示全部楼层
    make a jumper at ME pad and turn it power
    and then remove jumper and try

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