Looking for some suggestions on how to troubleshoot an Intercom issue in my 7. I have a PS Engineering PM3000 that has been working great for 240 hours. But recently it started giving me trouble. Basically it doesn't work after I start the engine. It'll power up but then the power will go on and off intermittantly. The funny thing though, as soon as I take off, it works perfectly for the rest of the flight and even on the ground. I'm going to start by checking the fuse, but after that I'm out of ideas, other than just checking wiring, which will be a major pain. Any ideas are welcome!
... Bill
... Bill