Interpreting Operator Control Panel Lights - DEC 4000 600 series Owner's Manual

Problems Getting to Console Mode
Figure 9–2 Operator Control Panel Lights
Table 9–7 Interpreting Operator Control Panel Lights
Light Meaning
6–1 Remains on if a Futurebus+
option has failed self-tests.
MEM 3, 2, 1, 0 Remains on if a memory
module has failed self-tests.
CPU 0, 1 Remains on if a CPU module
has failed self-tests.
I/O Remains on if the I/O module
has failed self-tests.
DC Power When on, indicates that DC
power is present.
When not on, indicates that
DC power is not present.
9–10 Troubleshooting the System
6-1 3
Reset Halt
Action on Error
Call Digital Services.
Call Digital Services.
Call Digital Services.
Call Digital Services.
If the DC on/off switch is set to on ( | ), reset
the system and examine the power supply
lights. If the problem persists, call Digital
Services.
2 1 0 0 1
MEM CPU I/O
DC On/Off
Switch
DC Power
Light
Self-Test
Status Lights
MLO-008872