Hello all, I have a 1980 that the FM tuner is dead. No sound at all, no FM light when selected. The am works. I have tested my power supply voltages and all are ok. 13 volts to tuner board is good. I have the schematic, and suspect an issue with the IC chips on the tuner board. I am just not sure how to trace through the tuner board to find the issue. I repaired a 1280 tuner board that had a bad PA3001 chip and I know they are hard to come by. I have a complete untested tuner board from a parts unit, and I thought about just swapping out the complete board. I removed a couple of the pins to keep from unwrapping them, but wanted to see if maybe someone here has some advise before I go and change the board out. I have not gone through the switches yet, but I have zero issues with any of them as of now. Areas that are common failures and areas to look first would be appreciated. Not much info out there on tuner repair on these things. Thanks, J.T.