System information

2-24
AlphaServer 800 Service Guide
To activate the FSL:
1. Move the jumper at bank 7 of the J1 jumper on the CPU daughter board. The
jumper is normally installed in the standard boot setting (position 0). Refer to
Figure A-1 in Appendix A.
2. Insert the console firmware diskette and turn on the system.
3. Reinstall the console firmware from diskette.
4. Power down and return the J1 jumper to the standard boot setting (position 0).
2.9 Power-Up Sequence
During the system power-up sequence, the power supplies are stabilized and the
system is initialized and tested.
The power-up sequence includes the following:
• Power supply power-up:
AC power-up
DC power-up
• Two sets of diagnostics:
Serial ROM diagnostics
Console firmware diagnostics
2.9.1 AC Power-Up Sequence
The following power-up sequence occurs when AC power is applied to the system
(system is plugged in) or when electricity is restored after a power outage:
1. The front end of the power supply begins operation and energizes. A minimal
set of remote server management logic is powered off the auxiliary 5V power
output.
2. The power supply then waits for the DC power to be enabled.
2.9.2 DC Power-Up Sequence
DC power is applied to the system with the DC On/Off button on the control panel.
A summary of the DC power-up sequence follows:
1. When the DC On/Off button is pressed, the power supply checks for a POK_H
condition.