How do you test a backlight inverter board?
Locate the inverter board inside the bottom edge of the LCD panel just below the LCD screen. Turn on your Multimeter device and enable “DC Mode” on the Multimeter. Attach the positive (red) probe to Pin 1 on the inverter board. There are two power cables connected to each end of the inverter board.
How do LCD backlight inverters work?
A screen inverter is a small circuit board in a laptop computer that passes a power current from the body of the machine to the attached liquid crystal display (LCD) screen. It works by turning a direct electrical current from the motherboard into an alternating current.
What does a backlight inverter board do?
An inverter board powers the backlight. A backlight inverter board is a common source of LCD backlight problems and can fool people into thinking their monitor is dead. The inverter works much like a battery for the LCD monitor.
How do you know if your backlight is broken?
To see if your TV’s backlight is causing the problem, make sure your TV is on, and turn off the lights in the room. Shine a flashlight on the screen to see if there’s a picture. If you can see a picture with the flashlight, then your TV’s backlight is burnt out.
How do you know if you have a bad backlight?
Desktop and laptop computer LCD monitors sport a long light bulb to display the video. When this bulb burns out, the screen dims to almost black. Failing backlights can also cause the picture to flicker, blink on and off or offer an odd color cast to the screen.
Do LED screens have an inverter?
As LED [Light Emitting Diode] screens don’t need the high voltages as of a cathode lamp, and LEDs require a DC voltage, the LED screens do not use the inverter. So, LED SCREENS DO NOT COME OR USE POWER INVERTERS.
How do I know if I have an inverter or backlight?
Turn your television on and shine a flashlight on the screen to look for an image. If you can see an image, then you likely have a bad inverter that needs replacement. The inverter board keeps the backlight of the television on.
What causes a backlight to go out?
Backlight circuit failure can also occur from damage to the electrical traces on the circuit board. If the electrical traces buried in the board are inadvertently severed—for example, from trying to fasten the board with too large a screw—the backlight circuit will not conduct power to the backlight LEDs.