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

[atree2012]

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

[esmat-fadak]

Check the mosfet and the gate pin and component in which they connected to it

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[atree2012]

I have checked and changed mosfet but still same. Another thing is that the Laptop is running OK on battery. If charger is connected with battery it shows charging but battery is draining instead of charging.

[bluestone]

The B+ is supposed to battery power. insert battery and see if B+ is still 0.83v

[atree2012]

Thanks for reply but There was problem in the VIN mosfet. My problem has been solved after replacing the mosfet.