Leds; System Board Jumper Settings - Compaq AlphaServer 1000A Owner's Manual

Quick Reference

LEDs

Table 9–6 describes system LEDs and their function.
Table 9–6: LEDs
LED
On/Off indicator (green)
Diskette drive activity indicator (green) Lights when the system is accessing the diskette
CD-ROM drive activity indicator
(green)

System Board Jumper Settings

Table 9–7 lists the default jumper settings for the system board.
Table 9–7: System Board Default Jumper Settings
Number
J16
J27
J50
J51
J52
J53
J55
J56
9-10 AlphaServer 1000A Rackmount Owner's Guide
Function
Lights when the system unit is turned on.
drive.
Lights when the system is accessing the CD-ROM
drive.
Name Description and Default
Large fan Allows the large fan to be disabled. Enabled.
VGA enable Enables the on-board VGA logic. Enabled.
Set to disabled position (pins 2 and 3) when
using a graphics option card
FROM VPP enable Permits the 12 volts needed to update the Flash
ROMs. Enabled.
SCSI terminator Enables the on-board SCSI terminators. The
system specification requires that the SCSI bus
be terminated at both ends. Enabled.
Temperature shutdown Allows the temperature chips to shut down the
system in an orderly sequence. Enabled.
Fan shut down Allows the software to shut down the system in
an orderly sequence. Enabled.
Fan-2 fault Allows hardware to detect Fan-2 fault and to
shutdown the system in an orderly sequence.
Disabled.
Fan fault Allows hardware to detect a fan fault and shut
down the system in an orderly sequence.
Enabled.
Set to disable if testing the system board or
CPU card outside the enclosure.