Attention:

Do not open your computer or attempt any repair before reading the Important safety information in the Quick Reference guide that was included with your computer or in the Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick Reference or the HMM, go to /ContentResources/Migrated Assets/think/support.

	Processor removal movie
	Processor installation movie

Important:

• Turn off your computer for at least one hour before removing the microprocessor to allow the thermal interface between the microprocessor and the heat sink time to cool down.
• When you receive a new microprocessor, you will also receive a new heat sink and vacuum pen. You must use the new heat sink with the new microprocessor. If you use the old heat sink with the new microprocessor, your computer might overheat causing intermittent problems.
• Do not touch the gold contacts on the bottom of the microprocessor. Use the vacuum pen provided to remove and install the microprocessor. If you must touch the microprocessor, touch only the sides.

To replace the microprocessor:

1. Open the computer cover. See Opening the cover.
2. Pivot the drive bay assembly upward to gain access to the system board.

3. Remove the heat sink 2 from the system board by pivoting the lever 1 securing the heat sink until it is fully in the up position. Carefully lift the heat sink off of the system board.

4. Release the lever 3 securing the microprocessor 2 then pivot the microprocessor retainer 1 until it is fully open.

5. Use the vacuum pen 1 to remove the microprocessor from the system board socket by lifting it out of the socket.

Important: Do not touch the gold contacts on the bottom of the microprocessor. If you must touch the microprocessor, touch only the sides.

b. Do not drop anything on the socket while it is open. Keep all contacts as clean as possible.

6. Make sure that the lever on the microprocessor retainer is fully open.
7. Loosen the black cover 3 that protect the gold contacts on the new microprocessor 2, but do not remove the black cover. Use the vacuum pen 1 to pick up the microprocessor, and then completely remove the black cover.

8. Position the microprocessor so that the notches on the microprocessor are aligned with the tabs in the microprocessor socket.
   
   Important: To avoid damaging the microprocessor contacts, do not tilt the microprocessor when installing it into the socket.
   
9. Use the vacuum pen 1 to lower the microprocessor straight down into the microprocessor socket.

10. Lower the microprocessor retainer 1 and then lower the lever 3 to secure the retainer.

11. Place the new heat sink 2 into position and lower the lever 1 to secure the heat sink.

12. Go to Completing the parts replacement.