Front Panel Board Components - HP ProLiant DL145 Maintenance And Service Manual

UID button
When performing maintenance on multiple servers in a rack or similar configuration, you can use the UID buttons
on the front and rear panels to mark a server by changing the state of the blue UID LEDs. Push either UID button
to toggle both UID LEDs on and off.
NMI button
If the system crashes or stops operating properly, you can use the NMI button (SW3) to mechanically force the
server to issue a non-maskable interrupt. This performs a memory dump—writing the contents of the processor
registers and RAM to a network server or to diskettes. This memory dump can later be analyzed to determine the
cause of the problem.
The NMI button is a recessed button on the rear panel that is accessible with a small tool without removing the
chassis cover.
NOTE: Use of the NMI button is not supported in all network operating systems (NOS). Currently, the NMI
feature is not available for systems running on Solaris and Linux operating systems.
System jumpers
The system board has two jumpers — the crisis recovery jumper (P56) and the CMOS jumper (P57). Figure 74
on page 63 shows the locations on the system board. The following tables show the jumper settings.
Table 5 Crisis recovery jumper (P56) settings
Jumper setting
Table 6 CMOS jumper (P57) settings
Jumper setting

Front panel board components

Figure 75 shows and describes the components on the front panel board. This board is linked to the system
board through the front panel board power cable and the front panel board USB cable. The front panel board
installs in the chassis upside down.
Function
Normal boot
Boot block enabled
Function
Normal CMOS settings
Clear CMOS settings and
restore system defaults
Connectors, buttons, and LEDs 65