Update the firmware if it is not already up to date.
- Unplug any add-in cards
- Unplug additional processors and memory DIMMs until there is only one processor and one DIMM installed.
- Install latest firmware from http://downloadcenter.intle.com
If that is not an option then...
First, look at the System Event Log for the main board
Also, check out this guide for troubleshooting boot issues. It does not sound like this is normal.