Problem in Yamaha rx -v 8000

Question edited for clarity, 'make model (what is is)'.
Question moved from Yamaha Cars.

Check out the video. If it has a fuse it will be inside by the power transformer.

https://www.google.com/search?q=Yamaha+RX-V677+fuse+location

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How do I reset my Yamaha RX-V730 A/V Receiver? ' Yahoo Answers

https://answers.yahoo.com/question/index?qid...

May 31, 2013 - I'm stumped on how to reset this receiver. I have no remote and just purchased a Powered sub woofer and it doesn't work that loud through the ...

RX-A730 - Yamaha Downloads United States

download.yamaha.com > Support > Downloads

13 items - ... About Yamaha. My Account ... Downloads for RX-A730. Find Your Model .... RX-A730 Owner's Manual, 14.07 MB, 4/17/2013. French, Manual, pdf ...

How do I reset my RX-V1800 parameters to the factory ...

faq.yamaha.com > Support > FAQs > Search Result: RX-V

Nov 13, 2010 - YAMAHA ... Power the RX-V1800 back on using the [Master On/Off] button and the receiver is now set back to the original factory settings.

Resetting/Initializing the receiver to factory settings - RX ...

I have similar issue. Did you find a solution?

Swap the speakers left-to-right to isolate if it's an amp or speaker problem. You have not indicated this was done.

It sounds like you have switched off the sub channel.
Keeping pressing C Level on the remote till you see SWFR.
Press D l / h to adjust the speaker output
level.

Go to the shop.

Nope. Use S-Video or composite video In and digital audio in from the Cable Box, S- or composite-video out to the TV/Monitor.

OR (what I do) skip the receiver as a video middleman and take the HDMI video right to the TV; and run the Cable Box digital audio to the Receiver.

I suggest you run self diag.  press [FM/AM] key + [Input mode] key and press the [power/standby] switch.

ps prt = power supply problem
dc prt = shorted output or leakly cap in channel
tmp prt means to hot on heatsink

you'll likely have to measure the resistances of the output FETs to find a short, 

check to see if there are any speaker wires that are touching each other near the connections. i had this happen on an onkyo receiver and found it was a purposeful feature intended to keep you from shorting out the receiver. if the + and - speaker wires touch (at the receiver posts or the speaker posts) this can happen.