Additional Led Information - Digital Equipment VAXstation 3100 Maintenance Manual

244 Diagnostic LED Definitions
Table G-1 (Cont.) Diagnostic LEDs Definitions
State Subst•te Deftnltlons
0011 0000
0010
xxxxl
0001 xxxxl
0000
The system exerciser started nuder
control of the
APT
test delivery
system.
The entity-based module received
a request from a host to enter
monitor mode.
This
lets the host
send conunands to the system. This
is
indicated if the functionality of the
E:SM
is implemented at a later release
of the system ROM.
Console mode was successfully entered
and is ready to accept commands.
This
does not apply to power on. The
substate indicates the
falling
subsystem
if there is one. This differs from a
self-test complete_, because the console
can
be
entered
by
other means.
Attemfting
to boot the system. Once
contro passes to VMB, the state LEDs
have na mea..n..ing.
Recommend1tlon.s
Read the test results
on
the
screen.
Troubleshoot the
falling device.
Reserved for future
use.
This code indicates
that the console
was entered
from
something other than
a 1EST command or
power on halt, such as
the
HALT botton.
System is booting.
1
1111 = MONO, 1110 = CLIC, 1101 =NVR, 1100 =DZ, 1011 = MEM, 1010 = MM, iOOi
=
FP. 1000 =IT, 0111
=
STR0-1 or SCSI-A, 0110 =SCSI-A or SCSI-B, 0101 =SYS, 0100
= 8PLN, 0011 =(option), 0010 =(option), 0001 =NI
Figure G-1 shows the LEDs on the back of the system box.
Figure G-1 LED Layout
G.1 Additional LED Information
When the system does not power up successfully or if the diagnostics find
an error, the eight LEDs on the back of the system box usually indicate
the failing device (the system takes 2 to 5 minutes to complete power-up
initialization and testing). However, if the
four state LEDs indicate 1111 (F
in hexadecimal) through 1010 (A in hexadecimal), the substate LEDs offer
no help in determining the failing FRU. You must disconnect an FRU as