*update* I also upgraded RAM and I did not put the new cards in snug enough. I fixed that and it did boot with the external monitored. I then: updated the OS, Updated the BIOS, ran two ATI driver display updates, and still not working. I really think it is either the inverter or the adapter inverter power cable that came with the LCD (yes it required an adapter, and they sent it along)... Is there anything I can do to troubleshoot this?