Lenovo IdeaCentre B520 - Manual (Page 50)

Hardware Maintenance Manual
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7. Lift up the speaker system.
8. Line up the new speaker system with the chassis then secure it using
the screws.
9. Connect the new speaker cables to the motherboard.
10. Reattach the EMI cover, back deco, the computer cover and computer
stand.
Replacing the 3D module
To replace the 3D module:
1. Remove the computer cover. Refer to “Removing the computer cover”.
2. Remove the back deco. Refer to “Removing the back deco”.
3. Remove the computer stand. Refer to “Removing the computer stand”.
4. Remove the EMI cover. Refer to “Removing the EMI cover”.
5. Remove the rear I/O module. Refer to “Replacing the rear I/O module”.
6. Disconnect the 3 cables from the 3D module.
7. Remove the 3 screws that secure the 3D module to the motherboard
and chassis.