Lenovo A540 All In One Lenovo A540/A740 Hardware Maintenance Manual - Page 33

Replacingthesystemfan

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Step 5. Push out the latches on both sides of the memory socket to release the memory module. Gently pull the memory module upward to remove it from its socket. Step 6. Align the new memory module with the memory socket, then insert it and push down on the top edge. Make sure the latches lock the memory module in place. Step 7. Reattach the base cover and secure it with the screws. Replacing the system fan Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the system fan Step 1. Step 2. Step 3. Step 4. Step 5. Step 6. 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. Unplug all power cords from electrical outlets. 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. Remove the base cover. Refer to "Removing the base cover". Remove the 3 screws that secure the system fan to the heat-sink. Disconnect the power cable from the motherboard. Chapter 7. Replacing hardware 27

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Step 5.
Push out the latches on both sides of the memory socket to release the memory module. Gently
pull the memory module upward to remove it from its socket.
Step 6.
Align the new memory module with the memory socket, then insert it and push down on the top
edge. Make sure the latches lock the memory module in place.
Step 7.
Reattach the base cover and secure it with the screws.
Replacingthesystemfan
Note:
Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Toreplacethesystemfan
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 base cover. Refer to “Removing the base cover”.
Step 5.
Remove the 3 screws that secure the system fan to the heat-sink.
Step 6.
Disconnect the power cable from the motherboard.
Chapter 7
.
Replacing hardware
27