So this afternoon the Nakamichi radio in my 00 GS400 quit working. The radio is lit up and shows what station you should be listening to but no sound. I checked the fuse for the radio in the fuse box by the battery and the "Radio" fuse was blown. I replaced it and after a few minuets the fuse stared smoking. The radio did not start playing when I put the new fuse in either. So I took the new fuse out and it was super hot. I tried a few other fuses but all of them would get very hot in a few seconds too. The amp in the trunk is extremely hot as well which is weird cause the radio has not worked at all today so idk why the amp would be hot? Anybody know what the problem may be? Never had this problem with it before.

 

Sounds like your amp has an internal short and is blowing the fuse due to the high current draw.