User Manual

5. Install the new M.2 solid-state drive on the bracket 1 and insert the new M.2 solid-state drive with the
bracket to the drive slot
2 . Then, install the screw to secure the bracket 3 .
6. Reinstall the base cover assembly.
7. Connect the ac power adapter and all disconnected cables to the computer.
Coin-cell battery
Prerequisite
Before you start, read Appendix A “Important safety information” on page 85 and print the following
instructions.
DANGER
If the coin-cell battery is incorrectly replaced, there is danger of an explosion. The coin-cell battery
contains a small amount of harmful substance. To avoid possible injury:
• Replace only with a battery of the type recommended by Lenovo.
• Keep the battery away from fire.
• Do not expose it to excessive heat.
• Do not expose it to water or rain.
• Do not short-circuit it.
• Do not drop, crush, puncture the battery, or make it subject to strong forces. Battery abuse or
mishandling can cause the battery to overheat, which can cause gasses or flame to "vent" from
the battery or coin-cell battery.
Replacement procedure
1. Disable the built-in battery. See “Disable Fast Startup and the built-in battery” on page 51.
2. Turn off the computer and disconnect the computer from ac power and all connected cables. Then,
close the computer display
3. Remove the base cover assembly. See “Base cover assembly (for T490 and P43s only)” on page 52 or
“Base cover assembly (for T590 and P53s only)” on page 54.
Chapter 7. CRU replacement 61