Toshiba PORTEGE M400 - Manual (Page 308)

4 Replacement Procedures 4.26 Digitizer
Do not turn up the digitizer because it may result to give stress on the TAB or PCB and
cause the display function failure.
Do not put any instrument on the LCD module because it may result to make scratch on
the cell, polarization sheet or B/L and break the TAB and may cause the display function
failure.
4-70 [CONFIDENTIAL] PORTEGE M400 Maintenance Manual (960-541)