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HP nx6320 AC Adapter Overvoltage Repair

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redskin61

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I repaired HP nx6320 ac adapter rated output voltage of 18.5v -after replacing the power mosfet(it was open) the output voltage is 19.5v. Now my laptop will shutdown automatically after I plug the adapter in less than a minute of powering on and will not power on again. I think the overvoltage protection of the laptop dc converter is doing this to protect the laptop from damage. Can someone me help me how to adjust the output of this ac adapter back to 18.5v? Can someone give me a link on the schematic diagram of this ac adapter?
 

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