Skip Navigation Links Blog | My Account
Skip Navigation Links.
Follow us
HyperLink HyperLink HyperLink


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

Buy Now

TST01 – custom build for testing 4 wires, 5 wires and 8 wires resistive touch screen.
LCD screen tester (for testing eDP/embedded Display Port interface). With its built-in Color bar generator, it can test resolution from 1280X800 to 3840X2160.
Testing LED Strip without Disassembly. IT03 can test all LED strips from a smaller industrial screen and up to 70 inch TV screen.
No more guess works!
LST01 is a custom build tester for Laptop screen repair; it can help you to isolate the problem between CCFL Backlight Lamp and Inverter in seconds.
Save Time! Save money!
LST04 - No setup time
Small and compact, easy to use, with build-in Color bar generator, you can test LCD screen size up to 60”
IT01 is design to test multiple backlight lamps inverter; it is capable to test any type of inverter up to 6 lamps at the time!
Stand alone Inverter tester!
The advantage of this custom build tester is that, you can apply any input voltage through DC Jack to test inverter from Laptop to LCD TV inverter.
UB Series LED Backlight
UB series are the direct replacement for Industrial LCD screens that were originally equipped with dual or 4 CCFL backlight lamps.
LCD Controller
These LCD Controller kits are designed to be easily integrated into the LCD screens that they are commonly used in kiosks, POS, avionics, Vending machine, Digital Signage and all other applications.
Retrofit LCD monitorfor MDT962B-1A

Retrofit LCD monitor for Mazak DR-5614

Sunlight Readable SKD kit
Copyright © 1996-2019 MoniServ, Inc. Home  Terms  Privacy  Contact Us   Online Store  Blog