Ballast trouble

[IJC]

I've got a workhorse 7 that powers my actinics (2x110). I've never had any trouble with it (for about 3 years now) until one day this week I came home and the all the power was off in my tank (it had tripped the breaker). I flipped the breaker back on and saw a spark fly off of the ballast and the power went out again.

I checked all the wiring at the back to see if there was anything obvious, but can't see anything (i'm no electrician). I tried pugging it back in, the flourescents come on for about a second, then a spark flys out of the corner of the ballast and the power goes out.

Time to buy a new WH7 i guess? Any ideas?