HP TC4400 - Manual (Page 135)

5–52 Maintenance and Service Guide
Removal and Replacement Procedures
2. Disconnect the speaker cable 1 from the system board and
route the cable under the infrared board cable 2.
3. Remove the two Torx8 T8M2.0×5.0 screws 3 that secure the
speaker to the tablet PC.
4. Remove the speaker 4.
Removing the Speaker
Reverse the above procedure to install the speaker.