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LST02 - How to isolate the problem on Laptop Screen

Testing Laptop Screen CCFL Back Light Lamp

Step1: Connecting CCFL back light to LST02
Use MS321EXT wire adapter and connect between Laptop screen back light lamp and any port of CCFL output on LST02
Step2: Apply VGA single to LST02.
You MUST apply VGA analog signal to LST02 since it has a built-in Controller, otherwise, LST02 will shut it off in few seconds.
Step3: Connect 12V Adapter
Step4: Push On/Off button to turn on LST02

The defective CCFL back light lamp usually has the following symptoms:
  • CCFL Lamp lights up in a reddish or pinkish color, but gradually becomes normal
  • CCFL Lamp lights up half bright and half dim
If the Laptop screen lights up, then your CCFL back light is working fine (You can also confirm that by turning on the laptop computer; you should see all contents on the screen). Then the problem may be caused by the defective inverter.
 
Testing Laptop Inverter
There is no need to apply 12V and VGA signal to test the laptop Inverter.
Step1: Disconnect 12V AC Adapter
Step2: Disconnect VGA Cable
Step3: Connect Inverter Tester' Connector to Lapto Inverter
Turn on your Laptop Computer. If the lamp lights up, then the inverter is working fine.
In a rare case, you may have to leave LST02 on for few minutes


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Save Time! Save money!
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