Help! QSC PLX3002 channel 1 crapping out

[NickfromSOS]

I am using a BBE Bmax preamp into a QSC PLX3002 into a Markbass Traveler 15 cab (400 watts at 8 ohms). I am running the amp in stereo (550 watts a side at 8). When i run the set up through Channel 2 of the power amp, it is great. no problems. When I plug into channel 1, the sound gets very low and distorted and craps out. I checked all components. the cab is fine, not blown. works great with all of my other power amps. Preamp is fine too. It is just channel 1 of the QSC. I have a gig tomorrow night and I want to use the QSC. Is it safe to use just channel 2 or can I expect that one to go as well? I guess my question is how separate are the stereo channels in 2 channel amps? Any ideas on what can be going on with channel 1?

thanks

[NickfromSOS]

After doing some thread reading and checking my serial number (which indicates a 1998 build date), I think I may have faulty ribbon connectors. Since QSC is no longer replacing them under warranty, how involved is the repair? Am I looking at a sub $100 repair or should I be ready to shell out much more? (assuming that there are no other issues that spring up)

[chucko58]

This seems to be the cable in question. It's $2.46 from QSC. You'll probably pay more in shipping...

Also try the QSC Audio support forum.