Hello all - first time posting here! I have a TYT TH-9800 quad-band radio, it's been around for a couple of years but has stopped working at some undetermined point while it was in my car. It's got some squeal on transmit and doesn't appear to output much power at all on the 2m band. I noticed it was broken when it wouldn't use any repeaters except those on the 70cm band. Has anyone had a problem like this before? I've tried a few things but I'm getting nowhere.