Toshiba PORTEGE M400 - Manual (Page 307)

4.26 Digitizer 4 Replacement Procedures
Do not make any scratches on the B/L and TAB by the edge of the digitizer when installing
the digitizer because it may result to break the TAB or make scratches on the B/L and
cause display function failure.
Do not pull up the PCB hardly when installing the digitizer because it may result to give
stress on the TAB or PCB and cause the display function failure.
Make sure that three latches fit the digitizer securely.
If the latches are not locked securely, it may result to move the digitizer and give stress on
the TAB or PCB and cause the display function failure.
PORTEGE M400 Maintenance Manual (960-541) [CONFIDENTIAL] 4-69