Toshiba Satellite C850-B539 power on with battery but doesn’t turn on when I plug in the AC adapter

If you have a Toshiba Satellite C850-B539 power on with battery but doesn’t turn on when you plug in the AC adapter, in mose case you have a failed mosfet DFMC8884 ( see the picture below ).

mosfet DFMC8884 on the motherboard

Replace this mosfet will solve the problem, I had replace with mosfet AO7406 and the laptop turn on again.

The problem is very common in this models of notebooks (Toshiba satellite C850) doesn’t turn on when you plug in the AC adapter but power on with battery or wont turn at all.

good luck

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