Samsung tv no backlights

SOURCE: Samsung LNR408DX/XAA Powers on with sound but no picture

I think you need to exchange the Main Board.

SOURCE: I have sound and backlight, but no display.

the t-con board need replacement( it is found on the top middle section of the lcd panel)

SOURCE: Dim display ... no backlight

You most likely have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :-
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:

• Screen flashs on red/pink and off.
• Picture stays on in red and slowly be come normal.
• Picture flickering with dim display or appear black.
• Picture flickering on and off.

All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

SOURCE: samsung lns4692dx sound no display

If could be either the inverter problem or power supply board. Take a look on the power supply and notice whether any caps look poping up. Else, you need technician helps to find out problem.

SOURCE: Everything works fine but backlight on display is

Hi

Thank you for your query

Please try the following

1) Press the fn key + up arrow key

The above key combination increases the brightness on the screen

If this fails you have a faulty inverter in your laptop, this is relativley cheap to repair

If option1 doesnt work, please book the laptop into a reputable PC shop

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