Dell OptiPlex 990 (Early 2011) - Manual (Page 23)

Speaker
8
Removing the Internal Speaker
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the cover .
3. Remove the front bezel .
4. Remove the drive cage .
5. Disconnect the speaker cable from the system board.
6. Pull out the speaker cable from beneath the system fan cable and wireless
local Area network (WLAN) antennae (if installed).
7. Release the latch and rotate the speaker.
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