MacPro 8 core Nvidia 8800, RAID card - arrived 2/25. NO OUTPUT TO DISPLAY/LCD MONITOR. Tried second monitor; monitor is blank (and turned on, and says "digital signal" when unplugging display connector from the machine, so it's recognizing the connection, monitor is fine on old G5) RMA'd for a new 8800, rec'd that on 2/28 - same result, so it's probably not the card. Tried 8800 card in different slots, so probably not a slot. Ram lights flash, HD spins, power light is on, so likely not power supply. 2 questions: Any ideas on what might be wrong? Motherboard or RAM is only other thing I can think of, or maybe some kind of incompatibility with the 8800. Also, the fans on both 8800's run at what seems like full power when turning the machine on - is that typical for the 8800? Maybe that's a symptom of the problem; it's a lot louder than I would prefer. Brought the machine to local apple store today, 24 hrs. or more to diagnose (ugh!). Thinking it might be better to take them up on offer of new box. Thanks.