Lenovo B750 IdeaCentre B750 Hardware Maintenance Manual - Page 46
Replacing the speaker system
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Step 9. Disconnect the subwoofer cable from the connector on motherboard. 1 Step 10. Lift up the subwoofer to remove it. 2 Step 11. To install the new subwoofer: a. Line up the new subwoofer with mounting screws on the chassis, the place the new subwoofer into position. b. Connect the new subwoofer cable to motherboard. Step 12. Reattach the EMI cover, middle cover, optical drive, computer stand and the rear cover. Replacing the speaker system Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the speaker system: 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. 40 IdeaCentre B750Hardware Maintenance Manual