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Do I need a Laptop Screen?

The most fragile component of the laptop is the laptop's display. You only need to replace the laptop screen if there is physical damage, if you see horizontal or vertical lines, or if the CCFL (backlight) is faulty. Below are problems and possible solutions to check to see if you need a new laptop screen.

Each of these issues are addressed in detail below:


DEAD PIXELS:

 

Dead (Defective) Pixels are pixels on a liquid crystal display (LCD) monitor that remains unlit (fail to reproduce light levels correctly), or black, when it should be activated and displaying a color. Each pixel on an LCD screen is made from three separate subpixels: red, green and blue. When combined, its form the colors that users see on the monitor. A dead pixel occurs when the transistor activate the amount of light that shows through all three subpixels malfunctions and results in a permanently black pixel. Dead pixels are rare and largely go unnoticed by the user.

Solutions:
Dead pixels are usually caused by manufacturing defects, and they will often stay illuminated for the life of the panel. In many cases it's possible to fix the pixel using either software tools or manual manipulation.

    • The software solution will generally flash a series of images that vary in color and intensity onto the screen in an effort to unstick the pixel.
    • Manual manipulation involves gently pressing on the affected area with something like a pencil eraser. Doing this compresses the layers of the panel, forcing the oil within the panel to move.
NOTE:This method is not guaranteed to work, and it may damage your LCD screen.

DIM SCREEN:

The ratio of the brightest white to the darkest black on a display screen. The larger the number, the darker the black is displayed.

Solutions:
The cold-cathode flourescent tube(backlight) is broken or the inverter is bad. Press the front panel on your LCD monitor to see if the on-screen display (OSD) comes up. If it does, then it's a bad inverter and this is what's needed to be replace. If the inverter is malfunctioning then it won't light up the lamps on your LCD, leaving the monitor with a dim display.

CRACKED SCREEN:

The LCD screen is one of the most vulnerable parts of the laptop - and probably the most commonly broken. It's cause by dropping it, break it or by flexing the thin plastic films of the screen to rupture allowing the liquid crystal to leak within the screen.

Solutions:
Cracked notebook screens in general are not repairable and should be replace. Click here on "How to replace your LCD Screen".


LINES:

The degree of resolution (horizontal and vertical lines) of a halftone image based on the number of lines-per-inch (lpi) or lines per centimeter, used to create the halftone. The line screen or sometimes called screen frequency at which an image is to be display.
A screen defect whereby a LCD screen exhibits vertical or horizontal lines and is not due to a defect of the notebook itself.

Solutions:
Connect your laptop to an external monitor. If the image appear on the external monitor, it’s indicate a faulty LCD screen.


BLACK SCREEN:

An Electronic Defect whereby the LCD screen does not render an image and is not caused by a defect in another component of the notebook.

Solutions:
The LCD screen does not have enough brightness or a black screen on a laptop display are usually due to a defective or dead backlight (CCFL) or voltage inverter that supplies high voltage to it.


FLICKERING SCREEN:

Flickering is an visible fading between cycles displayed on video displays, which is the monitor’s refresh rate, the speed with which the screen is redrawn. If the refresh rate is too slow, the screen will appear to glimmer (the persistence of the screen phosphors). Low-persistence phosphors fade more quickly than high-persistence monitors, making the screen to flicker more.

Solutions:

  • Check the cable: The cable from the motherboard to the inverter. This cable can get damaged due to twists when opening/closing the notebook.
  • Check the inverter. It’s a circuit board that controls electric flow to the screen.