Toshiba Satellite U840 Maintenance Manual page 55

Troubleshooting Procedures
Procedure 3 Connector and Cable Check
LCD Module is connected to system board by an LCD cable.Disassemble the computer
following the steps described in Chapter 4, Replacement Procedures.
If the connection is loose, reconnect firmly and restart the computer. If the problem still
occurs, go to Procedure 4.
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Satellite U840 Maintenance Manual (960-Q08)