Inelson15,
Have you taken the C1100 to a Minimum To Post configuration? This will let us know if it is being caused by something installed, or a root piece of hardware.
Take everything out of the system but the following -
System Board
CPU
Heatsink
1 DIMM
Power Supply
Reduce the system to this and then power it up and see if it will complete POST. If not , then I would assume the system board is the cause if you have tested everything else with known good parts.