[SOLVED]A1297 2011 820-2914,running slow ASD shows VD0R

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roy.ruan

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hi,
have this a1297 machine, came in with the "famous" video distortion problem.
so go ahead and replaced the GPU. video back to normal.

then found another issue, it will run very slow , like the sensing circuit problem kind. but the fans don't spin high speed.

so anyway, ran ASD, so error"4SNS/1/40000000:V0DR 19.245

looks like a ppbug g3h sensing? where should I start?

( the customer kept the battery, it was sent in without the battery there, not sure if that would affect,but I plugged in a service battery with the same result)
 

2informaticos

Administrator
Staff member
Check SMC_DCIN_VSENSE, at C5314.
It should be aprox 3V for 18.5V input charger.
If incorrect, measure voltages at Q5310 pins; some resistor is corroded probably...
 
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