I tried running it and it sticks at 3, won't go any farther. I unplugged everything per instructions and tried again. Same thing. Anybody else have this problem?
I'm all but certain that LDR #3 on the right channel board has gone out of spec and needs to be replaced.
I can send you replacement LDRs and you can replace them yourself or ship the unit back to have it done here.
The LDRs are socketed so once you've opened up the unit it's fairly simple to do. I'll provide detailed instructions.
Please PM me on how you want to proceed.