Samsung Laptop NP300 no power repair

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Samsung Laptop NP300 no power repair


In this video I am going to show you how to repair a Samsung NP300 (NP300E5-T03PT) that would not power on.
The charger had 19V, the charger when connected, had the 19V power rail, but it dropped at a Mosfet (9402GYT - N-Channel) near the battery connector.
I measured the power button and it had no Voltage.
So basically the solution was to change that 9402GYT Mosfet with a new one, but since I didn't have an exact match, the closest I found was a Fairchild FDMC7696.


Original Mosfet Specs
Advanced Power
Electronics Corp.
9402GYT
N-channel Enhancement-mode Power MOSFET
30V 11.5A 18m

Specs of Mosfet that i used
Fairchild
FDMC7696
N-Channel PowerTrench Mosfet
30V 12A 11.5m


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