Need Help! Marantz 4230 Loud Buzz Right Channel

[bsmckitrick]

So I Bought This Marantz 4230 off Craigslist, But it has a few issues. When plugged in and turned on it makes a very loud buzz tone out of every speaker on the right channel and no music comes out what so ever. The left channel sorta works where you can hear the music but its very faint and when turned up gets very distorted. But luckily and surprisingly all the lights work... Need help seeing what i should trouble shoot first.

 

[catrafter]

Marantz 4230

 

[rBuckner]

Read up on using DeOxit D5 spray to clean all of the switches, pushbutton and rotary ones too. In the meantime, exercise every pushbutton, with the power off, 20-30 times each and crank the rotary types back and forth as much. Don't even try any WD-40 in these!

Are there jacks on the back labelled "pre out" and "main in"? If so there usually has to be jumpers installed to make the connection and in Marantz units it's best to have shielded lugs or short RCA cables.

 

[KutzlerTrans]

Does it smell inside like burnt electronics?

 

[Rasputin47]

Don't forget to clean the switches on the back for remote and 2ch/4ch (make sure the unit is unplugged).