Laptop Hardware Repairer Question:
Download Questions PDF

How to test Back lights?

Answer:

Backlights can be tested by connecting them to a known good inverter. You can use one of the inverters they sell for case moding. Just provide a 12V input for it and connect your backlight to one of the output sockets. If your backlight illuminates then it is OK and the fault lies elsewhere. A pink or red hue to the screen is nearly always a sign of a failing backlight and if this happens it is well worth replacing the backlight as the only other thing that can cause this is a faulty screen.
Remember backlights work on an AC Voltage of around 1000v and although the wattage is very small can give you a nasty shock and could prove fatal if you have a pacemaker or similar.

Download Laptop Hardware Engineer Interview Questions And Answers PDF

Previous QuestionNext Question
Dell 1525 Inspiron that says system does not recognize the installed battery this system will not charge the battery?Explain inverters?