Mayer
We could have similar problems and may be able to help one another in finding a solution. First, where are you (I'm in Australia)? Second, do you get the sad safe following the "dong", and before a disk is inserted? And third do you understand the other possibilities that Oldturkey03 suggested (nonsystem disk in the default drive etc). As far as I can tell none of these are relevant because the 04 prefix to our errors (mine is 048360) means a RAM chip on the logic board.
Looking forward to your reply.
Barry Richardson
brlund007@gmail.com