Sun Enterprise 3500

Hello,
My power to the scsi-side and the fcal internal disk-connectors is gone.When I turn on the key, the fans under my disks just spins for 2 seconds then die. On board 1 all three leds are on, on the powersupplyboard( with the 1/0 swith and the powercable) the yellow light is on. I tried alot in the OBP but it all ends with "login-all? failed"
Ideas ?