Autible click at power-on, but standby light stays on and no functionality. Have tried pulling some/all inputs and outputs off (including speakers), then unplugging for a minutes or two, still nothing. No crowned CAPs.

Hi: Todd

One other thing you might try is running you hand across all the buttons on the front of the unit to make sure none of the are sticking closed. As this will give a indication of being locked up. In this state the Microprocesor will be in a loop trying to do the same function over and over again, the result of this is no other functions will work until it is resolved. If no buttons are sticking in the pushed posistion then open the unit and check all fuses on the secondary side of the large power transformer for opens. On this unit you should hear two clicks from two different relays, the first is the standby relay, and at this point the unit does what is called a post test (Power on seff test), if all goes well during this time the micro sends signal to close output relay this is second Click at this point music is heard. You did not mention if your display is working or not if not then you are missing voltage supplies from the power supply. I would be more concerned right now with the secondary low voltage supplies at this point, providing first solution does not work

Have a Great Day!