Replacing the motherboard – Lenovo IdeaCentre B750 All-in-One User Manual
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Important: To avoid damaging the microprocessor contacts, keep the microprocessor completely level
while installing it into the socket.
Step 15. Lower the microprocessor straight down into its socket on the motherboard.
Step 16. To secure the microprocessor in the socket, close the microprocessor retainer and lock it into
position with the small handle.
Step 17. Use a thermal grease syringe to place 5 drops of grease on the top of the microprocessor. Each
drop of grease should be 0.03ml (3 tick marks on the grease syringe).
Step 18. Reattach the heat-sink, system fan, EMI cover, middle cover, optical drive, computer stand and
the rear cover.
Replacing the motherboard
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
To replace the motherboard:
Step 1.
Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2.
Unplug all power cords from electrical outlets.
Step 3.
Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4.
Remove the rear cover. Refer to “Removing the rear cover”.
Step 5.
Remove the computer stand. Refer to “Removing the computer stand”.
Step 6.
Remove the memory modules. Refer to “Replacing a memory module”.
Step 7.
Remove the optical drive. Refer to “Replacing the optical drive”.
Step 8.
Remove the middle cover. Refer to “Removing the middle cover”.
Step 9.
Remove the EMI cover. Refer to “Removing the EMI cover”.
Step 10. Remove the system fans. Refer to “Replacing the system fans”.
Step 11. Remove the heat-sink. Refer to “Replacing the heat-sink”.
Step 12. Remove the CPU. Refer to “Replacing the CPU”.
Step 13. Remove the Wi-Fi card. Refer to “Replacing the Wi-Fi card”.
Step 14. Remove the TV tuner card. Refer to “Replacing the TV tuner card”.
Step 15. Remove the TV antenna connector.
Chapter 8
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Replacing hardware
49