combo amp speaker question

[Skeet Bonham]

i have a behringer gmx212 combo amp. i have used it for almost a year and no problems. i quit using it for two weeks. it was unpluged in climate controlled area. now only the right speaker works. i have tried different guitars with different cables and still the problem remains. can somebody help me please

[Enzo]

There is an amp for each speaker. Plobe a plug in and out of the slave in jack for that side a few tiomes. Does that wake the dead side up? Likewise, plobe a plug in and out of hte extension speaker jack for the dead side a few times. ANy help?

Plug your guitar into the slave in jack for each side and see if sound comes out each side.

[Skeet Bonham]

plugged into slave in on dead side and it works but a sizzle sound coming from it. plugged back into input speaker still doesnt work. also tried your other suggestions .wonder what it could be

[tubeswell]

My guess is most probably a bad solder joint?? Behringer uses crappy unleaded solder (because of Euro RoHS requirements) which is brittle and prone to other problems.