Has anyone experienced this problem? My Fender Blues Jr. is a few years old and rarely leaves the house. Recently the Reverb went out. The next day it was back. The following day it was out again. I've checked the RCA jacks and they are in place but do get some strange, distant and muted, echo noises working when you jiggle them in place. Then the reverb just stays dead. It's a shame because I've been playing Rockabilly on my Tele lately and I miss the reverb. The amp sounds fine, but some days the reverb works, and some days it doesn't. Can you suggest anything that would save me a trip to the shop? Thanks very much.