IBM pSeries 670 Service Manual page 856

c. Power off the system.
d. Set UEPO to OFF.
e. Disengage all DCAs from the back plane.
f. Plug the LGA-ST Tester D-Shell into the Capacitor card 9-pin D-Shell and tighten the screws.
g. Place the toggle switch into the MCM/L3 PWR/GND position and observe the lit LEDs. Refer to the
following table for valid LED states:
Toggle Switch MCM Green
Position LED
Forward (to the On
MCM/L3
PWR/GND
position)
h. Place the toggle switch into the L3 PWR/PWR position and observe the lit LEDs. Refer to the
following table for valid LED states:
Toggle Switch MCM Green
Position LED
Backward (to Off
the L3
PWR/PWR
position)
3. Install an L3 module.
836 Eserver pSeries 670 Service Guide
MCM
Amber L3 Green
LED LED
Off On
MCM
Amber L3 Green
LED LED
Off On
L3 Amber Battery Low
LED Amber LED
Off Off
L3 Amber Battery Low
LED Amber LED
Off Off
Action
1) If Low Battery LED is
lit, or if no LEDs are lit,
replace the battery
before proceeding.
2) If the battery appears to
be functioning and the
LEDs are not lit as
shown in this table,
disengage the
Capacitor book from
the system. If the LED
states are not as shown
in this table after the
Capacitor book is
disengaged, the
LGA-ST is defective.
Replace the unit before
proceeding.
Action
1) If Low Battery LED is
lit, or if no LEDs are lit,
replace the battery
before proceeding.
2) If the battery appears to
be functioning and the
LEDs are not lit as
shown in this table,
disengage the
Capacitor book from
the system. If the LED
states are not as shown
in this table after the
Capacitor book is
disengaged, the
LGA-ST is defective.
Replace the unit before
proceeding.