Replacing The Heat-Sink - Lenovo B40–30 Hardware Maintenance Manual

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 stand base. Refer to "Removing the stand base".
Step 5. Remove the foot cover. Refer to "Removing the foot cover".
Step 6. Remove the stand holder. Refer to "Removing the stand holder".
Step 7. Remove the middle cover. Refer to "Removing the middle cover".
Step 8. Remove the EMI cover. Refer to "Removing the EMI cover".
Step 9. Disconnect the antenna cable from the TV-Tuner card.
Step 10. Remove the screw that secures the TV-Tuner card to the motherboard.
Step 11. Pull the TV-Tuner card upward to remove it from the card port on the motherboard.
Step 12. To install the new TV-Tuner card:
a. Insert the notched end of the TV-Tuner card into the card port on the motherboard.
b. Secure new the TV-Tuner card to the motherboard with the screw.
c. Connect the antenna cable to the new TV-Tuner card.
Step 13. Reattach the EMI cover, middle cover, stand holder, foot cover and stand base.

Replacing the heat-sink

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo
recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches
or other damage.
To replace the heat-sink:
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.
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Lenovo B40–30 All-In-One Computer Hardware Maintenance Manual