Step 4. Make sure that the ac power LED on the power supply is lit, indicating that the power supply is
operating correctly. If the server is turned on, make sure that the dc power LED on the power
supply is lit also.
Removing and replacing Tier 2 CRUs or FRUs
This section provides information for removing and replacing Tier 2 CRUs for FRUs in the server.
You may install a Tier 2 CRU yourself or request Lenovo to install it, at no additional charge, under the type of
warranty service that is designated for your server.
FRUs must be installed only by Trained service technicians.
The illustrations in this document might differ slightly from your hardware.
Removing the power distribution board
Use this information to remove the power distribution board.
Read the safety information in Safety and Installation guidelines.
If you are replacing a server component in the water-cooled technology tray, you need to remove the water-
cooled technology tray from the chassis enclosure and refer to the “Removing a water-cooled technology
tray from a chassis” on page 139 and “Installing a water-cooled technology tray in a chassis” on page 140
sections.
To remove the distribution board, complete the following steps:
Step 1. Remove the cover (see “Removing the cover” on page 142).
Step 2. Remove the screws on the rear bulkhead bracket. The screw on the rear is a T8 Torx screw while
the other screws are T10 Torx
Removing and replacing server components
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