Lenovo 20RK, Руководство по техническому обслуживанию аппаратной части

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Before servicing the computer
Before you service this computer, do the following:
1. Disable the built-in battery. See “Disabling the built-in battery” on page 42.
2. Remove the nano-SIM-card tray. See “Removing the Nano-SIM-card tray” on page 42.
Disabling the built-in battery
Before replacing any FRU, ensure that you disable Fast Startup first and then disable the built-in battery.
To disable Fast Startup, do the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small
icons.
2. Click Power Options , and then click Choose what the power buttons do on the left pane.
3. Click Change settings that are currently unavailable at the top.
4. If prompted by User Account Control (UAC), click Yes .
5. Clear the Turn on fast startup check box, and then click Save changes .
To disable the built-in battery, do the following:
1. Restart the computer. When the logo screen is displayed, tap the prompt to display the Startup Interrupt
Menu window. In the Startup Interrupt Menu window, tap F1 to enter the UEFI BIOS menu.
2. Select Config ➙ Power . The Power submenu is displayed.
3. Tap Disable Built-in Battery .
4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off
automatically. Wait three to five minutes to let the computer cool.
Removing the Nano-SIM-card tray
Remove the following items before you service the computer:
• Nano-SIM-card tray*
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Hardware Maintenance Manual