Question Yamaha HTR-2064 turned itself off, won't power back up

[King Mustard]

We've checked the fuse inside the plug and the fuse inside the AV receiver itself.

Also, none of the capacitors appears to be damaged.

Any other ideas?

 

[King Mustard]

We've tried without any speaker cables being connected (in case of shorts).

We can't perform a reset due to no power.

 

[King Mustard]

Whilst selling it on eBay (as broken), someone messaged me and suggested I reset the main microprocessor by pressing and holding the Tone Control and Straight buttons whilst pressing the power button.

It actually slightly came to life! It made a 'buzz' sound, then click sound, and both only last for half a second in total before silence again. The display doesn't come on during this time.

I've let them know this and I'll await a response