Question : Problem: Can only access Bios in setup mode

I had to replace my motherboard. At startup, there was no post and I couldn't access CMOS by pressing F2, etc.  So I reset the jumper to access the bios setup.  It shows my Cpu, Ram, HDs, etc, but when I set the jumper back to normal, again, no post and I cannot access Bios.  I have tried 2 different video cards, and have a new 450w power supply.  Thank you for any help you can provide.

Answer : Problem: Can only access Bios in setup mode

seems dead, like suggested before DOA