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Red spot on LCD

When the background on my laptop is dark, one can notice a tiny red spot on the screen. All I need to know is as follows: 1) Technically what's a red spot? 2) How does a red spot occure? 3) Is a red spot a manufacturing defect? 4) When there is a red spot on the LCD. Do we require the LCD to be replaced immidiately? I bought a brand new "Advent 9215" 2 weeks ago and i already have a small red spot visible only on dark. Does anyone know what these spots are and why they appear?

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Hi,
1) That red spot means that a pixel is stuck, actually it's very common on LCDs.
2 and 3) It usually occurs for a manufacturing issue.
4) The most of the time it doesn't mean that the whole screen is going to fail, but in my case I would take advantage of the warranty if the laptop is brand new and the warranty is still there.
Good Luck!!!

Posted on Feb 24, 2009

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1 Answer

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You could have a defective screen - a defective inverter or a CCFL lamp.
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:
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  • Picture flickering with dim display or appear black.
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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.

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Check out www.lcdparts.net for parts, repair service and DIY info.

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1 Answer

My dell LCD does not work. computer work fine with external monitor. Some light came on briefly and it went dark again. I can see the deskdop with the flashlight in the background. I spend many hours talk...


You could have a defective screen - a defective inverter or a CCFL lamp, follow this to determine the fault.

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.
  • 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.
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1 Answer

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You could have a defective screen, either a faulty inverteror a CCFL lamp - follow this to determine the fault.

Defective CCFL backlight, it may have the following symptom:
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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.
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