software

Hey Guys, Im new to this forum and I'm no guitar expert, but I like playing music so I decided to join. Anyways I have a Fender Stage 100, which I think was taken out of commision last year. So about it month ago, when my band and I were playing together the sound went way down, almost to the point where it was barely audible, then sprang back up after like 5 minutes. So this has been reoccouring throughout the past couple months. Anyways we have a string of shows coming up in July and this simply cannot happen. I was going to take it in to this music shop around my house, but the guys there have screwed me over before, so I decided to come to you guys first to see if there is anything I can do before I cough up some money. I have never cranked it up to 10, not even once just for fun. However one of my idiot friends thought it would be a great idea to run a keyboard through it for awhile when I wasn't there. Now as I understand, hitting the low notes on a keyboard is the same as running a bass though a guitar amp, which isn't a good thing. Do you guys think the speaker may be blown, or did i short out some wires. I've tried everything to make sure this problem is with the amp as well, I ran my telecaster, les paul, and strat through it but it kept doing the same thing. I also switched cables at least 5 times. So I'm positive it's a problem with my amp. Could you guys give me a little input as too what is should do? Thanks.Ben.

you can see it here from : localhost/cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting