Internal power supply problem HP dv6-1160eg

[decsystem20]

Hello Everybody,

I have a problem with my HP Laptop.

The Model #: dv6-1160eg
The Motherboard Reads:
HannStar J MV-4
94V-0 0828

A Schematic of the board is available.

The problem is as follows:

- The machine was shut down properly, afterwards the plug of the external power supply was pulled.

- The next morning the power supply was connected to the wall outlet.

- The LED next to the plug on the laptop was flashing slow.

- The external power supply was checked for proper voltage The output was around 19V.

- Two other power supplies were tried with the same result, flashing LED near the plug.

- After dismantling the unit the voltage was checked at the connector on the PCB.
It changed between 0 and around 2-4 Volts.

I need help as to where to start looking for bad parts.
My first guess would be bad MOSFETS, but which one to check first?

If the FETs are bad, is it possible that there are other parts that go bad when the FETs die?

All help is greatly appreciated.

Regards,

Decsystem20

[khaahk]

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