Rotel receiver OK 2.0, but not 2.1 or 5.1

[fugsco]

Rotel RSX-1057.
There must have been some kind of short. The receiver had been acting funny occasionally, usually when watching TV, but also with CD input and tuner as well. It would fuzz out and get really quiet, static-y, unrecognizable noise, underwater. It would reset itself if I turned it off or even just switched inputs or any button push, and then be good for a while. It would happen more on TV than any other input. I thought maybe it was overheating, though it didn't feel especially hot. I moved it and made sure of plenty of air around.
This happened again, but this time the static and noise was alarming enough that I jumped up and turned it off quickly. Now the receiver will only produce sound in 2.0. Adding in sub produces nothing, as does any of the multi-channel settings, regardless of input choice.
I have removed and inspected all connections to no avail. I have opened up the case and nothing jumps out as burned or crispy. None of the physical connections are loose or sketchy. I have tried to run it with each individual input attached alone, each in turn... no go.
Ideas? Thanks in advance!!

 

[j_garcia]

Sounds like a board failing inside the unit. I would get it serviced and would not continue to use it.

 

[fugsco]

Well...thanks for your response. All hooked back up and working again- for now- on all settings. I did replace sub cable; it was recycled from years ago and may have had some issues back then. Do you think it possible that a short in that (RCA) cable could have caused my troubles? All settings other than 2.0, which was working, add in the sub (I think) and if the problem were in the sub connection then that makes a certain level of sense. However I did tell the receiver that there was no sub (and unplugged the sub) with no change. Why would regular TV (Saturday Night Live, etc) trigger the issue. Will TV tax the sub- at low volume- more so than bumping Peter Tosh?

 

[markw]

Dunno the answers to all the questions you posed in that last question but I would be very, very surprised if it was just a sub cable.

I'd keep an eye (or ear) on that unit. I think it's on the way out.

 

[j_garcia]

Based on your description of the issue, I don't think it was a cable issue either. Unless you had a speaker wire shorting to the chasssi that was fixed by disconnect/reconnect, I'd also expect this unit to continue to go south.