Droke,
Don't you have a Soundgate audio adapter installed in your H2? At least one other member on this forum is having the exact same problem because of the adapter.
One thing you can check on the adapter - Pins in the connectors tend to work loose as they are not locked in very well inside the connectors. This causes an intermittent connection which could cause the problem. Otherwise, disconnect and remove the adapter and see if the problem goes away. I'm betting it does.
Version 3 of the adapter is out, and version 4 is being worked on because version 3 is so bad!
Klaus
Rare 2003 H2 with UM8 Integrated Navigation Radio
Skull & Bones Member since 2003