dynabook PORTEGE X30W-J, Maintenance Manual

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2 Troubleshooting Procedures
PORTÉGÉ X30W-J, dynabook V*/VZ*/VC* Series Maintenance Manual (960-941) [CONFIDENTIAL]
2-27
2.9.3 Procedure 3 Connector Check and Replacement Check
The connection between the display (LCD, touch panel) and system board may be loosening
or either may be defective. Disassemble the computer referring to the steps in Chapter 4,
Replacement Procedures and check the followings.
Check 1 Make sure the cable (LCD HARNESS) is securely connected to the connectors on
the display and the system board.
If the connection is loose, reconnect it firmly. If there is still an error, go to Check 2.
Check 2 The harness may be damaged. Replace it with a new one and go to Procedure 2 to
test the display again. If the problem still exists, perform Check 3.
Check 3 The LCD unit may be damaged. Replace it with a new one and go to Procedure 2
to test the display again. If the problem still exists, perform Check 4
Check 4 The display controller on the system board may be damaged. Replace the system
board with a new one.
LCD HARNESS
(SENSOR HARNESS, TOUCH PANEL HARNESS)
System board
CN5390
LCD + touch panel
3AXIS
SENSOR BOARD
CN9860