Question about BenQ FP91G (Black, Silver) 19 inch LCD Monitor

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Blank LCD screen

I have a LCD screen that wont fire up. I believe the green light shows up that it is on but nothing on the screen. It is not the computer as I have another screen on there now and it works fine. I have had someone look at the screen and he has said in only comes on very faints, thought it might be a "globe". However, Im not sure LCD's have them. Is this common and/or worth getting fixed?

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Hi,

The description "comes on very faint" is indicative that the backlight is not turning on. The backlight as the name implies provide the illumination of the rear panel of the LCD display. It is made on 1 or more CCF Lamps (cold cathode florescent lamps) and are powered by an inverter that provides the high frequency high voltage needed for the CCF lamps to work. Since the entire screen is dark and it is highly unlikely that both or all the lamps would go out at the same time, it would highly be likely that the inverter is the culprit being the common denominator to all the lamps.

Should you venture to perform a DIY (do-it-yourself) (with the necessary precautions and safety in mind), look for a board that would have small transformers and have connectors that leads to the CCFLs. They often go bad because of dried up/blistered capacitors, cold solder or a general failure in the electronics.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 02, 2008

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