my friend found a jcm900 on a local classified ad for 200$

"unfortunately this one has a problem blowing fuses" is what the ad states.

does anyone have a guess as to what the problem could be and how much it could potentially cost to fix?

thanks for any help
Unfortunately, it could be anything and everything, from a ten cent resistor to a $400 transformer to a massive gaping burnt out hole in the middle of the board.

I have seen all three, and all three most certainly blew fuses!

Sorry, no good answer.

Ask the guy if he'd let you pay for a tech inspection, I've done that kind of thing for prospective buyers before.