Lenovo ThinkSystem HR350A, User Manual And Hardware Maintenance Manual

Page: 26 / 171

26
Removing the system air duct
To reinstall, reverse the steps above.
2.2.5 Backplane replacement
Do not proceed before reading and understanding the "Safety Precautions" section of this chapter and "Read Me First".
CAUTION:
The power-control button on the device may put the device in standby mode instead of turning off the device. In
addition, the device may have multiple connections to DC power. To remove all electrical current from the device,
ensure that all connections to DC power are disconnected at the DC power input terminals.
To remove the backplane, do the following:
1.
Turn off all attached devices and the server.
2. Disconnect the ac power cord from the electrical outlet.
3. Remove the top cover. See "2.2.3 Top cover replacement".
4. Disconnect the power and SATA/ NVMe cables from the backplane.
5. Remove all installed drives and dummy trays (if any) from the drive bays.
6. Remove the system fan cage for easier operation.
7. Lift the release tabs (Step 1) to disengage the backplane from the chassis (Step 2).