For access, remove these FRUs in order:

• Battery pack
• Hard disk drive door
• Hard disk drive or solid state drive assembly
• PCI Express Mini Card for wireless LAN
• PCI Express Mini Card for wireless WAN
• Keyboard
• Keyboard bezel assembly and power button board
• Fan assembly, system board assembly, and DC-in connector
• LCD unit
• LCD bezel assembly
• Backup battery

Please perform the following steps as shown in the pictures below:

When installing:
Make sure that the connector is attached firmly.