digadv wrote in post #6095792
As for discharging the capacitor, get a piece of INSOLATED wire and place it across the two terminals. If you have not had batteries in the unit for two months or more, you SHOULD be OK, but it's best to be careful and discharge the capacitor.
If you don't know anything about electronics, you're probably wasting your time and should buy another unit. Alternatively, you might be able to find a local electronics store that may be able to fix it.
Personally, I'm an electronics junkie and have grown callous to "Moore's Law" which describes your disposable electronics feeling.
Do NOT short the terminals of a capacitor. On top of probably making you crap yourself if you aren't expecting it, you will damage the capacitor. The caps in flashes and other high-volt electronics (TVs, amplifiers, etc) carry plenty of power to kill someone if the current goes through your heart (thus the making of the "one-hand" rule where one hand is left in a pocket to avoid the current crossing your body/heart). If you are to short the cap while it's still charged, it will spark, make a loud pop, and will pit/burn whatever you use to short it. For instance, I've shorted the cap in my 283 around 2-3 times with a small screwdriver. The points where that screwdriver touched the cap's leads both are charred and have pits in them from the electricity jumping the gap. On top of the whole danger part, you are damaging the cap. The capacitor in my 283 now does not hold a strong charge unless it's being constantly fed from the batteries. It used to be slightly above 300V before I shorted it twice (and once with a high-watt low-resistance resistor). Now, after charging the flash fully, removing the batteries and firing off a full power pop, it only holds somewhere around 90-100v.
If you want to discharge a cap, you'll need a high-power resistor with a decent resistance. I use a combination of 3-4 resistors that total somewhere around 100-200k ohms. Two of those resistors are 10-25w, the other is probably a 5w. After maybe 20-30 seconds of shorting the cap terminals with these resistors (I have them in series with two alligator clips on the end, where I attach two screwdrivers), the cap is completely discharged.
Do you have pics of the flash disassembled? I'm not familiar with that specific flash, but I can't assume it would be too hard to repair. I'd be willing to bet the most of that cost for repair is labor, and chances are the techs know what they're doing, generally and specific to that flash. They most likely have a service manual that tells exactly how to disassemble the flash, diagnose a problem and replace busted parts with minimal effort. They get paid a ton, too 