The most crucial part of any LCD device is the screen. It is usually designed with high-level technology to enhance high-quality pictures and excellent performance. The screen’s backlight is made to regulate the screen’s brightness level. Sometimes, however, you may observe uneven whitish dots appearing on your blank screen when no video is playing.
The appearance of these dots is an ordinary condition that should be expected. Sometimes the appearance of these white dots on the TV’s screen can be highly frustrating to the viewers. However, the situation can easily be rectified. This article explains the possible cause of the white dots on the screen and a few adjustments that one can make to get rid of the problem.
Common problems associated with LCD screens
A newly bought LCD TV or monitor functions smoothly until it starts displaying some problems with time. There are several problems that your LCD device might face, as discussed below;
a) Vertical lines on the screen
Lines displayed vertically on the TV’s screen is a common problem that many customers have reported. The lines can appear in any colour. If the lines change on applying slight pressure on the screen, your LCD is damaged. Thus, for a better display, you have to replace the screen entirely.
The problem is commonly experienced in the TV’s hardware; hence, always ensure that the device drivers are up to date. It is also recommendable that you check on the control panel settings of your display and set everything normal. Check the working of the TV’s graphics card as might be the cause of this problem.
b) LCD screen flickering
Sudden screen flashing might result immediately after you turn on your LCD. The flickering results especially when the video cable is loosely connected, especially from the screen. It is, therefore, essential to make the connection tight to bring about screen stability. Faulty cables as well may result in screen flickering.
Improper setting of LCD refresh rates can also lead to screen flashing. Different LCD models have different refresh rates. Thus, ensure that you set your LCD to the correct refresh rate to avoid flickering problems.
c) Blotches and cracks
Some marks or cracks on your LCD screen appear due to physical damages caused to the LCD. The cracks or spots are easily noticeable in that they appear different from the display colours. Various incidents that cause these problems include; hitting the screen with sharp objects, falling off the screen, or splashing liquids on the screen.
To rectify these problems, you will need to make a display replacement. In most cases, the damage is experienced on the internal LCD screen. Cracks on this screen cannot be repaired, hence the need for a new one.
d) Random display shutoffs
Frequent display shutoff is a common problem with most LCDs. The problem can be caused by power fluctuations or interference with your house’s primary power source. Electricity problems affect the circuit breaker, resulting in random power-offs.
When your TV overheats, it may shut down. Overheating heats up the TV’s processors. One can quickly notice this problem by feeling some heat on the TV’s covering. The LCD cooling system may be damaged; hence the display goes off, avoiding more damages.
e) Dead pixels on the screen
Dead pixels are black spots that permanently appear on the screen. Pixels on the affected part do not brighten up, thus making the place appear black. However, your screen remains functional apart from the affected area. To fix this problem, one can get particular software programs to get rid of the dead pixels.
This software alters the spot’s colour by rapidly changing it to different colours. It requires a knowledgeable person on the software installation to avoid further issues. However, it’s recommended to keep your device in use as long as you can view contents from the other screen part. If the problem spreads widely, you can replace the entire screen.
Causes of white dots on your TV’s screen
Many individuals purchase TV screens for watching movies or streaming various events like shows in their homes. However, the appearance of white dots on the display screen can make one miss some information, creating a bad feeling. You can opt to replace the entire screen with a new one to fix this problem, though it may be costly.
Defective reflectors in the LCD cause these white dots. The reflectors get dislocated, leaving a gap in the array, triggering irregular white dots on the screen. Stuck pixels on the LCD screen may also cause the white dots on the screen.
How to fix white dots on the screen
Replacing the entire screen is quite expensive. However, below are some helpful steps to fix the problem;
- On a solid bench, place your TV screen faced upside-down.
- Remove all screws and remove the back section. Safely keep the screws.
- Disconnect the speaker connection and remove it.
- Unscrew the source Printed Circuit Boards (PCBs) screws and disconnect all cables.
- Remove the display covering by loosening the LCD screws.
- Carefully take out the display board from where it is fixed using vacuum cups. Gently place the display panel on a stable table as it is very delicate.
- Remove the internal covering bracket to locate a white panel. The panel contains LEDs and LCDs light distributing diffuser sheets. Take out these sheets and keep them safe.
- One can locate small and rounded reflectors at this point. However, the reflectors are not in their recommended positions. Fix them to their respective specific places by glueing or locking them up carefully.
- Once you have fixed the reflectors, bring together the LCD by following the above steps in reverse. Take time to fix everything appropriately.
Keenly follow these steps to fix white dots that might be present on your display screen.
Conclusion
Experiencing white dots on your TV for quite some days will be frustrating. One might even think of doing away with the TV and maybe replace it with a new one. Before you think of disposing of your TV, try fixing the problem to retain your TV’s functionality.
However, fixing the problem requires one to be keen not to mess with the LCD. The process can be complicated, hence the need for some technical skills. It could be better if one opts to get a professional to fix the problem. Otherwise, if done in the wrong procedure, the LCD might end up experiencing additional problems.
