David, Complain, long, and firmly, not necessarily loudly but firmly. Ask to escalate the case, get names of who you're talking to as you work your way up the ladder. Apple covers their replacement parts with a 90 day warranty so if the DC board blows up it should be covered but really it's unlikely to blow. Though also Apple will say it could be the non stock video card and non stock HDD put too high a load on the DC card. And technically they're probably correct though we all know the machines normally handle that and more. Just don't go out of your way to mention the changes you've made... Now if only Powerlogic had done a redesigned DC board.... Good luck Frank Look up look way up...