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From what I have read, my inverter board has gone haywire in my acer flatscreen monitor. the screen lights for a second or two then goes very dark with a ghost of the computer's desktop image barely able to be seen with a flashlight (lights stays green on monitor). I am by no way a computer repair person, but i do like to try to atleast diagnose my own computer problems. This seems to be the problem this morning. is there an easy fix or do I just buy another monitor and call it a day?

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You can change the inverver PCB or check the cable running from board to ya screen for any possible loose lighteen and check for any effect b4 changing the inverter board

Posted on May 24, 2008

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My acer aspire 5313 works when connected to externel screen and has a dim screen when using the screen. i have changed the screen, inverter, and signal cables but still same problem. i looks like the...


Hi Daniel,
The LCD screen displays is dark/ dim because there is no backlight.
There are two parts responsible for lighting the display. First is the CCFL (Cold Cathode Florecent Lamp), which is the back light and the second is the Inverter board, which provides high voltage to the CCFL. Either of the parts can be faulty or in some rare cases both. But most likely it is the CCFL (Lamp). Its life is limited and depending upon how long it has been in use, you can have a better idea - if its the CCFL or Inverter.
(Rest assure that your system/ motherboard is ok as you have checked it by connecting you laptop with some external display, which is working fine). Hence, the board/ graphics processor is OK. (In case the graphics processor fails, there is no display at all on the external monitor)
So, my advice is that you check the laptop LCD display for replacement of CCFL. I have found a general link about CCFL replacement. Click here for detailed and graphical DIY instructions about LCD disassembly.
Make sure you take proper precaution while working inside LCD, as the inverter generates a very high voltage.

Hope it helps! Good Luck!
CreativeTECH

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Hello !

Since an external monitor works, it is the display's backlight or inverter board.

If you were experiencing discoloration in the screen (pinkish lower light hues) before it failed, that would indicate a CCFL backlight issue. If the screen suddenly went dim on you rather than a slow degradation the inverter would be indicated.

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I have also heard of an overheated computer causing a similar problem.

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This sounds like your back lights are going out or the power supply section has a problem.

If you turn the computer on then look at the edge of the screen if you see a ghost image then it would confirm the back light problem. That can be caused by several internal problems. You should check with a different monitor or try your monitor on a different machine to confirm the monitor is the problem. Check your warranty to see if you can get it replaced.

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If you have a laptop or, flat screen monitor; as, opposed to a CRT monitor[. your screen brightness is provided by one or, two tiny fluorescent tubes commonly known as a "cold cathode" these are powered by a circuit board known as an inverter board that is like the ballast in your office fluroescent light.
Just like the ballast aforementioned:The inverter board changes the DC power of the laptop or, flatscreen monitor to an AC amplified voltage to light the display.
If your screen shows a red color or, takes time to brighten or, flashes on and off or,flickers like a bad fluorescent light in your office This is most often the problem. You can purchase replacement parts fot the cold cathode and, or; the inverter board and find instruction on how to change these components online in the manual of your respective computer or, on e-bay on such sites as; laptoppartsdirect.com

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Hi there. It's probably your backlight inverter that has gone bad. What model is it ? The inverter can be on a seperate board, or on the main board on that viewsonic LCD. Is it a VX922 ? Common problem on these..

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My screen is to dark


I am assuming this is an lcd. Usally when a screen goes dark the back lights are not lighting. This can be caused by
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The inverter board supplies the voltage to the back lights, it also supplies the video signal to the LCD tab welds.

If the monitor is a CRT, first, attempt to degauss it. if that fails then the cost of repair would exceed the replacement cost.

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