[Shop-talk] Audio receiver repair?

[Jim Franklin]

I have an old Advent model 300, which was a nice unit back in the day. I 
put it in the garage and connected it to a pair of bookshelf speakers 
and a dual-speaker subwoofer. It made no noise for a few minutes and 
then went POP.

THEN I read the manual which said don't plug it into 4 speakers of less 
than 8 ohms each. Mine are all 4 ohms :-\

I found a blown fuse and replaced it but now it blows right away. Is 
there any way for someone mostly clueless about electronics to diagnose 
what's broke? I have a basic multimeter for tools, and I understand big 
electrons, but not the small ones...

thanks,
jim