Lenovo THINKSERVER 392 - Manual (Page 150)

5. Note down the cable routing and connection. Then, disconnect the power supply assembly cables from
the system board and all drives. For server models with hot-swap hard disk drives, you also need to
disconnect the power cable(s) from the hot-swap hard disk drive backplane(s).
6. Release the power supply assembly cables from the cable clips and ties in the chassis.
7. Remove the four screws 1 at the rear of the chassis that secure the power supply assembly. Then,
push the power supply assembly from the rear until it is released from the metal retaining tab 2 .
CPU
MEM
Figure 77. Releasing the non-hot-swap power supply assembly
138 ThinkServer Hardware Maintenance Manual