For access, remove these FRUs in order:

• Battery pack FRU.
• Bottom door FRU.
• Hard disk drive FRU.
• Keyboard FRU
• Palm rest assembly, power-on board assembly (with cable), and microphone FRU.

Following components soldered on the top side of the system board are extremely sensitive. When you service the system board, avoid any kind of rough handling.

• [a] Accelerometer chip for the HDD Active Protection System™
• [b] North Bridge
• [c] CPU
• [d] South Bridge

When installing: Make sure that the connectors are attached firmly.

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

DANGER:
Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode.

When installing: Make sure that the connectors are attached firmly.

When installing: Before you attach the fan assembly to the system board, you need to peel the thin film off from the thermal rubbers as shown in this figure.