Lenovo thinkpad L450 User Manual page 153

4. If your computer came with a SIM-card tray, remove the SIM-card tray before you remove the bottom
cover. See "Installing or replacing the SIM card" on page 121.
5. Remove the rubber caps.
6. Loosen the screws 1 . Then remove the cover 2 3 .
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Chapter 10 Replacing devices