Assuming that you are using a compatible CPU from the list below:
& compatible Memory List
Make sure that the 4-pin power connector for the cpu is connected.
Use only ATX12V or EPS12V compliant power supplies with the server board SE7210TP1-E. ATX12V and EPS12V power supplies have an additional power lead that provides required supplemental power for the Intel Pentium 4 processor. The board will not boot if you do not connect the 20-pin (or 24-pin) and 4-pin (or 8-pin) leads of ATX12V or EPS12V power supplies to the corresponding connectors.
Do not use a standard ATX power supply. The board will not boot with a standard ATX power supply.
1. Do a clear cmos by chaging the jumper and remove the memory
Does the board issue any beeps? If yes, how many?
2. Then try to test the board out of the chassis and if it boots, try a bios recovery using a formatted USB media.
Refer to the TPS for the POST LED:
All the best,