Light Path Button; Power-Supply Leds - IBM 7940 Problem Determination And Service Manual

DIMM 10 error LED
DIMM 11 error LED
DIMM 12 error LED

Light path button

The light path button allows you to review error indications after ac power has been
removed from the server. Press and hold the button, which is behind the operator
information panel, to relight the error LEDs that were lit before you removed power
from the server. The LEDs will remain lit for as long as you press the button, to a
maximum of 30 seconds.

Power-supply LEDs

The following minimum configuration is required for the DC LED on the power
supply to be lit:
v Power supply
v Power cord
The following minimum configuration is required for the server to start:
v One microprocessor in microprocessor socket 1
v Two 512 MB DIMMs on the system board
v Power supply
DIMM 7 error LED
DIMM 8 error LED
DIMM 9 error LED
BMC heartbeat
LED
Microprocessor 2
error LED
Microprocessor 2
VRD error LED
Fan 1 error LED
DIMM 1 error LED
DIMM 2 error LED
DIMM 3 error LED
DIMM 4 error LED
DIMM 5 error LED
DIMM 6 error LED
Battery error LED
Slot 1 error LED
Light-path power LED
Slot 2 error LED
Microprocessor 1
error LED
Microprocessor 1
VRD error LED
Fan 3 error LED
Fan 2 error LED
Chapter 5. Diagnostics
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