Yesterday my radio quit working and I got the "No Radio" on the display.
I have a 2002 LT with the BMW ComSystem which was made by J&M. There are several threads on this forum about the very same problem, and I read them all. This is apparently a common problem and there several possible solutions. Some have been able to solve the problem by disconnecting the battery for a while (30 minutes or more) and reconnecting it. I tried this and it didn't fix my problem.
One person said his problem was caused by a blow 10 amp fuse located on the back of the radio. My fuse was not blown.
One rider said that his problem was due to corrosion on the circuit board under the control buttons on top of the stingray. Apparently cracks in the rubber around the buttons allows moisture in, particularly when it rains or when the bike is washed. In his case he cleaned off the corrosion and it temporarily fixed the problem. Unfortunately, he found out that the rubber boots can't be replaced. I took the control panel apart and found no corrosion.
In many cases replacing the radio was the only solution. Some have had their radios replaced several times.
I finally tracked down my problem.
The culprit turned out the be the Ice-Link I had installed for my Ipod. I disconnected the Ice-Link and the problem went away.
I plugged it back in and the problem came back.
The Ice-Link never worked very good anyway so now it's in the trash. I will just use the Aux. jack to listen to the Ipod.