Vintage Synth Repair

Hey guys,

I have a Juno-106 that stopped turning on a little while after I had
replaced a voice chip. I'm still learning about electronics and I'm
just looking for some pointers on how to use my multimeter (or
anything else in my lab at school) to test the fuse board, or power
supply board, or maybe even to test the transformer?

Thanks for any help,

-Johnny