How to fix Asus VG278 white screen

How to repair a white screen Asus VG278 monitor.
MOSET is location Q308 has shorted and cause the SMD fuse to blow. This is all on the LCD flex board (T-con built into the LCD flex).
The original mosfet is a part number 12H34
I replaced it with a AO3400 AO9T Specs: N-Channel, VDS 30V, ID 5.7 A Package SOT-23

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