When installing: Attention: As you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. • Ensure that the connectors are attached firmly. 1220 Keyboard bezel assembly Note: Before you start the servicing, disable the built-in battery. See “Disabling the built-in battery” on page 64. For access, remove these FRUs in order: • “1010 Removable battery” on page 64 • “1020 Nano-SIM card” on page 65 • “1030 Base cover assembly” on page 65 • “1040 Memory module” on page 68 • “1050 Internal storage drive” on page 69 • “1060 Wireless-WAN card” on page 73 or “1080 M.2 solid-state drive in the Wireless-WAN-card slot” on page 74 92 T480 Hardware Maintenance Manual