[Al Skierkiewicz]

Daniel,
The current sense resistor might not grab your attention if is missing. This was the case in some of the devices I inspected. Generally, when a FET goes bad, it leaves a burned area around it. The plastic FET retainer/insulator will be melted and there will be black marks on the board as well as burned circuit board traces. If the FET is open, you can measure with a VOM. Use the diode test position on your meter if it has one. In general with a failed FET gate driver, there is no visual damage. However, on several I have examined, the FEET driver chip had blown apart one corner and left a crated on the board.