Picked up a Tektronix 465 from a Goodwill in Portland for $40 last weekend. Got it home, fired it up, and the trace went fuzzy after maybe 20 minutes then the screen went dark. Cracked it open and found a bulging cap on the power supply board. Tried replacing it myself with a spare I had but now the thing just hums. Anyone know a decent repair shop in the PNW that won't charge more than the scope is worth?