2 Troubleshooting Procedures
dynabook PORTEGE A30-E/TECRA A30-G,-J/dynabook S Series Maintenance Manual(960-931) [CONFIDENTIAL] 2-27
2.9.2 Procedure 3 Connector Check and Replacement Check
The connection between the display (LCD) 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 cable 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 display 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
System board
CN5390
LCD
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