hi!
i'm having this problem with my yamaha dx7.

if i select the internal patches my display looks like this:

INTERNAL VOICE
Bank4 XXXXXXXX

where XXXXXXXX is just some arrows that point to the left and some lines..

if i select the Cartridge patches everything looks like normal but my dx7 doesn't play anything..
it sends midi and all but no sound..

does somebody know what's wrong?
i'm getting kind of angry here.. =)

regards, andreas