I have a Spider V 160 that I've had for 2.5 years. Never had an issue until a few days ago. I turned it on and plugged in but couldn't get any sound. I double checked the volumes on the guitar and the amp. I tried a different cable. Also, tried a different guitar. Still no sound. I turned off the amp and was going to plug in to another amp that I own. On a whim, I turned the Spider V back on and tried it again. It worked perfect this time, and it had worked fine ever since. It's great that it is OK now, but I now have this fear every time I turn it on that it won't work. Does anyone have an explanation? Has anyone else experienced this?