Alpha R2, won't start after BIOS update

Went on to Dell driver update site and download latest BIOS which installed OK restart fail with these steps

1. 180w power supply not recognized (rebooted)

2. Restart actually reached the Alienware screen then frozen

3, 3rd attempt power on light just flashes once and nothing else happens

4. Will not  boot from an external drive

Cannot reboot unit is dead and  is only 18 months old.BIOS

Sorry I ever updated the