How to automatically boot the Fujitsu PrimePower 450 server without stopping at OK Prompt

Problem

OBP (OpenBoot PROM) auto-boot=auto did not work after power failure on Fujitsu PrimePower 450 (4U)

Identify the problem

1. Check:
   - auto-boot
   - boot-command
   - boot-device
   - Server maintenance switch
2. auto-boot should be set to TRUE
3. boot-command should be set to BOOT
4. boot-device should be set to DISK
5. Server maintenance switch should be set to LOCK