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Chapter 2 Troubleshooting Procedures
Satellite L600D/L640D/L645D, Satellite Pro L600D/Pro L640D/Pro L645D Maintenance Manual (960-Q08)
2.20 LED Troubleshooting
These are 6 LED lights at Top assy. From left to right, the Open statuses of them represent
functions as below.
1. AC-IN 2. Power 3. Battery 4.HDD/SSD
5. Card Reader 6.W-Lan
To check if the computer’s LED is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: Each function Execution Check
Procedure 2: Connect Check and Replacement Check
Procedure 1 Each function Execution Check
In this procedure, you must first make sure all components except LED are working right.
Then you can execute the related function to check if the corresponding LED is on or not. If
not, please go to Procedure2.
Procedure 2 Connect Check and Replacement Check
LED light is built on system board; the system board may be faulty. Disassemble the
computer following the steps described in Chapter 4, Replacement Procedures.
Check 1 The system board may be faulty. Replace it with a new one following the
instruction in Chapter 4.