Lenovo 4156 Personal Computer User Manual


 
9. Lower the new microprocessor straight down into the microprocessor socket on the system board.
Figure 50. Installing the microprocessor
10. Close the microprocessor retainer and lock it into position with the small handle to secure the new
microprocessor in the socket.
11. Reinstall the heat sink. See “Replacing the heat sink” on page 55.
What to do next:
To work with another piece of hardware, go to the appropriate section.
To complete the replacement, go to “Completing the parts replacement” on page 75.
Replacing the hard disk drive bracket
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
on page v.
This section provides instructions on how to replace the hard disk drive bracket.
To replace the hard disk drive bracket, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 33.
3. Locate the hard disk drive. See “Locating components” on page 11.
4. Disconnect the signal cable and the power cable from the hard disk drive.
60 ThinkCentre User Guide