Handheld LCD display gadgets such as mobile phones, tablets and gaming devices are routinely used in today’s tech-savvy world. These devices, however, can encounter display issues that can impair their performance and functionality. In many cases, repairing these problems can save you from purchasing a new device. As DIY repairs become increasingly popular, this article aims to discuss how to fix common handheld LCD display issues.
LCD Display Structure
To diagnose and repair LCD display problems, you should first understand its basic structure. Inside the LCD screen lies a layer of liquid crystal cells sandwiched between two layers of glass. The device’s colors are produced when light passes through these liquid crystal cells, which twist and untwist to allow varying amounts of light to pass through. When the LCD display issue arises, it generally relates to these parts, or to the power source that controls the light intensity.
Dead Pixels
Dead pixels are a common LCD display issue. They appear as small dots that are stuck on a particular color. These pixels are usually “stuck” and do not change with the screen’s color variations. Repair tools known as pixel-exercisers— which flash different colors rapidly—can be used on areas of the screen with dead pixels. To use a pixel exerciser, place it over the affected area, and then let it run for around 20 minutes.
Ghost Imaging
Ghost imaging refers to the problem where a faint image from a previous screen remains visible on the screen. This usually occurs due to slow screen refresh rates.
Fixing this issue often requires adjusting the screen refresh rate on the device. For most devices, this can be found in the settings panel. For windows, it is under the Display Settings in the Control Panel. If adjusting the refresh rate does not solve the issue, it may be a hardware problem related to the device’s graphic card, which may require professional assistance to solve.
Screen Flickering
Screen flickering is another common issue that users experience. This problem occurs when the screen continuously blinks at different brightness levels. It can stem from hardware or software issues. Always start by updating the software and device drivers.
If that doesn’t help, adjust the display settings. However, if none of these steps work, consider replacing the screen’s inverter as a last resort, as this part supplies power to the screen’s backlight.
Vertical or Horizontal Lines
Vertical or horizontal lines appearing on the LCD screen can impede visibility. This issue may be traced to graphics system misalignment or a damaged screen. Try restarting the device as first-line treatment. If unsuccessful, it may be necessary to reconnect the video cable to align the device’s graphics system properly.
Onboard diagnostics can help with confirming suspicions of damaged hardware. If invoked, you might need to replace the screen itself or the video card.
Physical Damage
Physical damage, such as cracks and deep scratches, can render the handheld device unusable. In such cases, replacement of the screen might be your only option. Keep in mind, replacing an LCD screen can be complicated, requiring specialized tools and exact replacement parts.
Overheating
Handheld devices tend to overheat with prolonged use. This can often lead to display issues. Managing applications and reducing device usage can prevent overheating. Investing in cooling accessories can also help manage temperature levels.
Backlight Failure
Backlight failure makes an LCD screen virtually impossible to read as the screen looks very dim. This usually happens when the power supply for the backlight burns out. Backlight repair or replacement is a complicated process, which definitely calls for professional expertise.
LCD bleeding
LCD bleeding refers to the dispersion of light on the screen, which results in poor contrast and color rendition. Contact your manufacturer for repair options for LCD bleeding, as it is incredibly challenging to fix this issue without professional tools and expertise.
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Having the knowledge about how the handheld LCD display works and familiarizing oneself with common issues and their fixes can save time and money. But, one should bear in mind that not all issues can be solved at home. In those cases, seeking the right professional assistance to ensure the longevity of the device is the smart choice.
