Alright this thing is really getting on my nerves.
I want a list of conditions that the microcontroller in this unit can detect which would cause it to turn off.
There is nothing wrong with the power amplifiers. At one time I had this receiver running for two days with no problems whatsoever. At the time, I believed there was a bad solder connection on the upper amplifier board (the one containing all the voltage regulators and the surround amplifiers), as barely tapping said board would cause the power to turn off. I removed the board, resoldered everything large (typical failure points) and reassembled. There was no change. I once again removed the board, and resoldered a bunch more stuff (things that looked cold/weak) and reassembled again. Now it shuts down EVERY time. I press POWER, it turns on for about three seconds, then shuts off. Sometimes the speaker output relays click on then back off immediately at the same time as the power turns off, other times the only click is the power supply relay.
The original failure caused the reverse diode on the power supply relay to short. I replaced said diode.
Since I KNOW none of the power amplifiers are shorted, I accepted the risk of bypassing the power supply relay. Apparently the computer in this unit is smarter than me, since, even though it could no longer actually turn off the power, it still blanked the display and stopped responding to user input, as if it were off. The power amps do work in this state, as I can inject a signal and drive speakers with them, further proving that there is no actual fault to respond to. I am strongly of the opinion that the microcontroller has been smoking something it really shoud be sharing with the rest of us.
I want to know what conditions will trigger the computer to turn the power off so that I can first try to figure out what is actually wrong, or, failing that, trick it into minding its own business and leaving me alone. Elsewise the whole thing is going to the basement where I will shitstomp it and mangle it in ways Yamaha never imagined.
Please give me some input on this unit. I've never had this much BS with an amplifier in my life, and after a similar experience with a Yamaha powered mixer (TONS of bad soldering on the power supply board) I am quickly losing any respect I ever had for Yamaha. Nice features and would probably be good products IF THEY'D LEARN TO FREAKIN SOLDER.