Replacing The Cover Presence Switch - Lenovo 70AL Maintenance Manual

9. Install the new power supply assembly into the chassis so that the four screw holes in the new power
supply assembly are aligned with the corresponding holes marked with A in the rear of the chassis.
Then, install the four screws
Note: Use only screws provided by Lenovo.
Figure 77. Installing the non-hot-swap power supply assembly
10. Refer to your note to connect the new power supply assembly cables to the system board and or the
power conversion board, depending on the model. Then, properly route the cables and secure the
cables with the cable clips and ties in the chassis.
11. Reinstall the front system fans. See "Replacing the front system fan 1" on page 130.
12. If you are instructed to return the old non-hot-swap power supply assembly, follow all packaging
instructions and use any packaging materials that are supplied to you for shipping.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the replacement, go to "Completing the parts replacement" on page 149.

Replacing the cover presence switch

Attention: Do not open your server or attempt any repair before reading and understanding "Safety information"
on page iii and "Guidelines" on page 65.
1
to secure the new power supply assembly in place.
.
Chapter 6 Installing, removing, or replacing hardware
125