HP TC4400 - Manual (Page 122)

Removal and Replacement Procedures
Maintenance and Service Guide 5–39
16. Position the tablet PC with the rear panel toward you.
17. Lift the display assembly slightly until it disengages from the
tablet PC 1.
18. Route the display connector and cable through the opening 2
in the base enclosure.
19. Remove the display assembly.
Removing the Display Assembly
Reverse the above procedure to install the display assembly.