So it looks like a 3-terminal mosfet with some high voltage on it, and was it 2 source resistors in parallel that got toasted ? Do you know the supply voltage for the mosfet ? The gate drives on a lot of these types of things are all pretty generic, and the same.
Was it a main's powered Dell, so with some internal step-down type converter, or did it have a power pack ? Or was it a mosfet in a latter stage, running the backlight voltage rails ?
Oh nevermind I didn't look at David's post pic with the main's plug.