Heres the service manual of an ASUS monitor i was given because it was dead-D901 sc and R909 oc both on the primary side of the power supply then had intermittent backlights due to poor soldering on D805,which has a BAW56 fitted on the board a replacement was fitted from a scrap panel.....now a working monitor

 

Thanks for this. It could come in handy since I have a few monitors to trouble shoot.