Lenovo System x3750 M4, Installation And Service Manual

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2. Make sure that the circuit breaker for the dc power supply is off.
3. Attach the dc power cable to the new power supply. Make sure that the power cable wires are
connected securely to the -48 V, ground, and to the -48 V return terminals (as shown in the following
illustration).
Power input LED
Power output LED
Power error LED
-48V
Ground
-48V return
4. Facing the rear of the server, insert the power supply spacer into the left side of the power-supply
bay (against the bay wall) against the wall on the left side of the power supply bay, if you removed
it.
Filler
panel
00
00
00 0000000
0000000
0000000
0000000
00000000000
00000000000
00000000000
00000000000
00000000000
00000000000
000000
000000
000000
000000
000000
00
00
00
Power supply
release tab
Spacer
Spacer
release tab
750-watt -48 volt dc
power supply
5. Slide the power supply spacer into the bay until it snaps into place on the tabs that are on the side
of the bay.
6. Grasp the handle on the rear of the power supply and slide the power supply forward into the
power-supply bay until it clicks. Make sure that the power supply connects firmly into the power-supply
connector.
7. Route the power cord through the hook-and-loop strap so that it does not accidentally become
disconnected.
8. Turn on the circuit breaker(s) for the dc power supplies.
9. Reconnect any external cables that you disconnected.
10. Slide the server back into the rack, if it was in a rack.
11. Turn on the server and the peripheral devices.
12. Make sure that the server starts correctly and recognizes the newly installed device, and make sure that
no error LEDs are lit.
Removing the system board
Use this information to remove the system board.
Before you remove the system board from the server, take the following steps to save data, firmware,
and configuration data:
Chapter 6
.
Removing and replacing components
299