Lenovo ThinkPad E475 User Manual

Also see for 20H4: Hardware Maintenance Manual

Chapter 8. Replacing devicesThis chapter provides instructions on how to install or replace hardware for your computer.Static electricity preventionStatic electricity, although harmless to you, can seriously damage computer components and options.Improper handling of static-sensitive parts can cause damage to the part. When you unpack an option or aCustomer Replaceable Unit (CRU), do not open the static-protective package until the instructions direct youto install the part.When you handle options or CRUs, or perform any work inside the computer, take the following precautionsto avoid static-electricity damage:• Limit your movement. Movement can cause static electricity to build up around you.• Always handle components carefully. Handle adapters, memory modules, and other circuit boards by theedges. Never touch exposed circuitry.• Prevent others from touching the components.• Before you install a static-sensitive option or CRU, do either of the following to reduce static electricity inthe package and your body:– Touch the static-protective package that contains the part to a metal expansion-slot cover for at leasttwo seconds.– Touch the static-protective package that contains the part to other unpainted metal surface on thecomputer for at least two seconds.• When possible, remove the static-sensitive part from the static-protective package and install the partwithout setting it down. When this is not possible, place the static-protective package on a smooth, levelsurface and place the part on the package.• Do not place the part on the computer cover or other metal surface.Disabling the built-in batteryBefore replacing any CRU, 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 Smallicons.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 your computer. When the logo screen is displayed, immediately press F1 to enter ThinkPadSetup.2. Select Config ➙ Power. The Power submenu is displayed.3. Select Disable built-in battery and press Enter.© Copyright Lenovo 2016, 2018 83