Hi,
This is Cleeve with La Jolla Audio Repair. I thought I would try to help you figure out what to do. It seems that the radio internally is starting to fail. There is a battery inside your radio that has probably dropped below normal operating voltage. This will sometimes cause the radio to forget what it was doing after the engine is shut off. You could wind up with 4 dashed lines across the display window (----) and then need to have the dealer decode it. My suggestion is to contact me directly and see about getting an Exchange Unit that we stock. It's just old and needs to be fully serviced like the Exchange Units we have. Fresh parts, Battery,caps, rollers, gears, belts, etc.

You can contact me via my Web Site: www.lajollaaudiorepair.com

Cleeve Morrison
Repair Manager