Lenovo Legion Y720T, Hardware Maintenance Manual, Page: 34 / 57

Cleaning rear dust screen
To replace the system fan:
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 computer cover. Refer to “Removing the computer cover”.
Step 5. Press then pull the out the rear dust screen as shown.
Step 6. Cleaning tips:
a. Us a brush gently brush through the dust screen to remove the dust.
b. If cleaning the dust screen with clean water, make sure you dry the dust screen completely
before put it back.
Step 7. To install the rear dust screen:
a. Line up the new dust screen with the chassis and push the screen into position.
Replacing the keyboard and mouse
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Removing the computer cover
Attention:
• Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
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Lenovo Legion Y720T Hardware Maintenance Manual