I have a JBL PB12 sub that I bought 6/2001. The other day I went to start it up and it was "talking back" to me popping several times followed by a long loud hum. I turned it off quickly and turned it back on a few minutes later and it did the same thing. I unplugged it and let it sit for a few more minutes and tried again. This time it won't even turn on. There are red LED's in front that don't light any more. It's completely nonresponsive. I checked the breakers just to see it was tripped, and all was normal back there. Anyway, I'm sending it in to be serviced but that is a 2 1/2 hr drive from my house. I will probably UPS the thing. I was wondering if you guys knew of anything I could check or do before I went to the trouble of shipping it to a strange store?? (They are the closest store that is authorized by JBL to do warranty repairs.) As a side note, I bought the sub from Consumer-Direct Warehouse which says they are an authorized dealer of JBL products. JBL says they are NOT an authorized dealer of their products and may take legal action on them. JBL was not going to honor my warranty, but decided to give me a one-time approval for warranty service. Anyone dealt with this stuff before???