Hello, I have an issue with a KDSP2 module. It totally mutes the receiver when I turn on the radio with it, but it comes to life when I remove it. The DSP board is OK when I try it in my other K2. I suspect the defective Q7, but I'm not 100% sure. Am I on the right track to troubleshoot, or should I also check Q5 and Q6? Thanks, Chris KM1B