Replacing the converter board, Removing the emi cover – Lenovo B40-30 All-in-One User Manual
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Replacing the converter board
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 converter board:
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 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.
Disconnect the two cables from the converter, and then remove the two screws that secure the
converter board to the chassis.
Step 9.
Lift up the converter board out to remove it.
Step 10. To install the new converter board:
a.
Connect the two cables to the new converter board.
b.
Align then place the new converter board into position.
c.
Secure the new converter board with the screws.
Step 11. Reattach the middle cover, stand holder, foot cover and stand base.
Removing the EMI cover
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
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