Lenovo Horizon 2e Table PC - Manual (Page 46)

Step 7. Remove the five screws that secure the heat-sink module to the motherboard.
Step 8. Lift up the heat-sink to remove it.
Attention: Place the heat-sink upside down on a flat surface to prevent thermal grease contaminating
other components.
Step 9. To install the new heat-sink:
a. Use an alcohol pad to wipe the thermal grease off the CPU.
b. Line up the new heat-sink module with the mounting holes on the motherboard.
c. Secure the new heat-sink to the motherboard with the screws, making sure to fit the screws in
sequence following the numbers printed on the new heat-sink.
d. Reattach the system fan to the rear cover.
e. Use the adhesive tape to seal the gap between the heat-sink and system fan.
f. Reconnect the battery cable to the motherboard.
Step 10. Reattach the rear cover and secure it with the screws.
Replacing the motherboard
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear 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. Disconnect the battery power cable from the connector on the motherboard.
Step 6. Remove the memory modules. Refer to “Replacing a memory module”.
40 Lenovo HORIZON 2e All-In-One PC Hardware Maintenance Manual