When a pixel never shows light, it's called dead pixel, but if that pixel always shows light (red, green, or blue) when your laptop is active, it's called stuck pixel.
Yesterday I found a dead pixel on my Acer laptop. I want to replace the laptop's LCD screen, but Acer Limited Warranty says :
Minor defects of LCD displays occurring in Products equipped with LCD display technology, provided that there shall not be more than four (4) defective pixels per million pixels on a given LCD display, and provided further that, if the display panel is divided into nine (9) equal rectangular areas, there shall be one defective pixel in the central area of the display. AcerSo it's not covered by the limited warranty and I decided try to fix it by myself. There are several methods to fix dead/stuck pixels, but first you should know where the location of the defective pixels. You can use Dead Pixel Buddy (Download) or UDPixel (Download) to find the defective pixels on your LCD screen.
Pixel Fixing Software Method
This method has been reported to work many times (for stuck pixels)
Open UDPixel > Flash windows: 1 > Flash size: 5x5 > Flash interval: 25ms > click Start
If you found more than one defective pixel, change the Flash windows value to 2
Set Flash interval to 5ms if your LCD monitor has 5ms refresh rate
Drag the blinking dot, and then wait for a few hours. Alternative tools to do this method: http://www.flexcode.org/lcd2.html
First, locate the defective pixels and then you can use your finger to apply a gentle pressure/massage on the LCD screen, you don't need to turn off the monitor. Do not use your nail and make sure your nail is not sharp or it will accidentally scratch the screen surface. This method worked for me on my LCD monitor (dead pixels).
Another pressure method:
- Turn off your computer's monitor.
- Get yourself a damp washcloth, so that you don't scratch your screen.
- Take a household pen, pencil,
screwdriver, or some other sort of instrument with a focused, but relatively dull, point. A very good tool would be a PDA stylus. (You can use your finger)
- Fold the washcloth to make sure you don't accidentally puncture it and scratch the screen.
- Apply pressure through the folded washcloth with the instrument to exactly where the stuck pixel is. Try not to put pressure anywhere else, as this may make more stuck pixels.
- While applying pressure, turn on your computer and screen.
- Remove pressure and the stuck pixel should be gone. This works as the liquid in the liquid crystal has not spread into each little pixel. This liquid is used with the backlight on your monitor, allowing different amounts of light through, which creates the different colors.
Good luck ...