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8. Reinstall the upper multi-function bracket, the upper front fan assembly, and the power supply
assembly. See “Removing and reinstalling the multi-function brackets” on page 139, “Replacing the
front fan assemblies” on page 141, and “Replacing the power supply assembly” on page 143.
9. Reinstall the direct cooling air baffle. See “Removing and reinstalling the direct cooling air baffle” on
page 128.
10. Reinstall the computer cover and reconnect the cables. See “Completing the parts replacement” on
page 183.
Note:
When the computer is turned on for the first time after replacing the battery, an error message
might be displayed. This is normal after replacing the battery.
11. Turn on the computer and all attached devices.
12. Use the Setup Utility program to set the date, time, and any passwords. See “Using the Setup Utility
program” on page 65.
Installing or replacing a flex adapter
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Read this first: Important safety information” on page 1.
Depending on your computer model, the following flex adapters might be installed in the flex adapter slots:
• Flex adapter with two mini-SAS HD connectors
• Flex adapter with one SATA 3.0 connector, one USB 2.0 connector, and two mini-SAS HD connectors
• Flex adapter with two M.2 slots (with the M.2 solid-state drive installed in some models)
To install or replace a flex adapter, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 111.
3. Lay the computer on its side for easier access to the flex adapter slots.
4. Locate the flex adapter slot in which you want to install or replace a flex adapter. See “Locating parts on
the system board” on page 34.
Note:
If your computer is installed with only one microprocessor, ensure you install a flex adapter into
the flex adapter slot 1. If your computer is installed with two microprocessors, ensure you install flex
adapters into the flex adapter slot 1 first, and then the flex adapter slot 2.
5. Depending on whether you are installing or replacing a flex adapter, do one of the following:
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ThinkStation P900 Hardware Maintenance Manual
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