HP NonStop G-Series - Manual (Page 159)

The 5157/5157 ACL S-Series Subsystems Installation/Users Guide
Appendix A
vi
A.2 Troubleshooting for Field Support
A.2.1 Control Panel
The control panel consists of four LED indicators, a 4-line
by 20-character backlit LCD display, and four buttons.
Figure A-3 shows the control panel.
Figure A-3 Control Panel
A.2.2 Power-On Self Test Screen
When power is first applied to the module, a series of
power-on self test (POST) diagnostics is performed. During
POST execution, the model number of the module, the
current date and time, the firmware revision, and the status
or result of the test in progress are displayed on the control
panel as shown in Figure A-4.