S60 radio HU-613

Hello. I am new to the forum and I am having problems with the HU-613 radio in my 2002 S60. The radio works great but the light that shows what station I am listening to does not work. At the same time that the light went out, the radio controls on my steering wheel also quit working. We can replace the fuse, clean the fuse and put the fuse back in and it solves the problem but just for a short while. It kepps happening again. The dealer says I need a new radio and software ($700!) but I am hoping that there is a simpler and less expensive fix to this problem. I've been hearing that maybe a software upgrade might solve it.