[ICOM] IC-730 Troubleshooting Help

[RadiosRUs]

Mystery problem.

The other day while transmitting on 40M mobile SSB my trusty IC-730 went completely dead. The power cord has two in-line fuses but both are good. I have a circuit breaker right at the battery-- that too is good. I disassembled the radio and found an internal fuse located in an inline fuse holder right behind the power amp sub-chassis. That too was good. The IC-730 just does not power on. I thought perhaps I had smoked the finals as it was raining when I was transmitting and would at least come on in receive. Voltage to the plug shows normal.

Any suggestions? I thought too perhaps the On/Off switch simply went south -- I tried holding it in --suspect the switch is actually engaging a relay and probably is OK. Is this a common problem?

Thanks in advance for any help.

73's
Pete W6JFR