I bought an Orion XTR2150 off of ebay recently untested. Knowing this was never a good sign, I still managed to get it for an excellent price. It didn't come with the plugs, so I am waiting on those before I can hook it up. Popped the bottom off and everything looks to be in excellent condition except.....one of the mosfets(? transistors maybe? Not sure what they are called, the things that attach to the heatsink) is completely missing. Gone, nothing left but the sodder points. I have a 2150sx that is in a LOT worse condition internally (2 caps and a huge metal looking diode, plus a rather crispy looking transformer) and its working like a champ so far, suprisingly. What I am wondering is will this XTR2150 work without the missing part? Or should I just go ahead and send it on in for repair now? Gotta say, that thing is built like a tank inside, other than the missing part. I'll take some pics of it soon, incase anyone wants a visual of what I am reffereing to.