3 monitors, 1 triplehead2go.. 1 input not working.. oh crap

hey guys,

as some of you know, I have been proudly yakkin away about how I'm gonna have a tri-monitor setup and the matrox triplehead2go blah blah...

well, i bought the tri-monitor stand last week, and got my eVGA 8800GTS 640 in yesterday, now i'm just waiting for Matrox to release their TripleHead2Go Digital Edition (for super-sweet bezel management )

UNFORTUNATELY, I just realized that one of the monitor's DVI input is no longer working properly... it sees that there's a signal, but stays in sleep mode... it is NOT the cable, or the output on the card.. I've tried 2 other DVI cables, and I've tried both jacks on the card... it DOES work with the DSUB cable...

Each of these monitors has had brand new inverters put inside within the past 6 months (they were all given to me in the burnt-out inverter state, so i repaired them all)

they're all 18.3" Gateway FPD1830 LCDs with the silver bezel...

can anyone think of anything to try to get the DVI on this monitor to work again? because this monitor is hard to find, and all 3 work, just one with DSUB only, and I don't want to have to sell all 3 and buy 3 new monitors (although 19's with max resolution of 1280x1024 would be sweet)...

Please help!