How to Repair LCD Screen

Review warranty policy. Almost every new computer comes with a warranty of at least one year. If the warranty period is still on, contact the manufacturer for a free repair or a discounted price. Self-repair usually voids this warranty.

Check the power light. If the screen does not display the image, turn on the monitor and observe the indicator light on the edge. If there is a light, go to the next step. If none of the lights come on, the power supply (or one of the accessories that lead to it) is probably damaged. Most likely the capacitor has burned out. You can repair the capacitor yourself, but don’t forget that the power supply contains dangerous high voltage components. Unless you have a lot of experience in electrical repairs, you should seek professional service.

• Other signs that a capacitor has burned out include a loud hum, horizontal lines, and multiple images on the screen.
• Power is one of the most expensive parts of a monitor. If the problem doesn’t stop with the capacitor, fixing the source can be quite expensive. If your screen is old, you should probably consider replacing it with a new one.

Shine a light on the screen if the screen is black but the indicator light stays on. In case the image appears when you shine the light on the screen, the problem lies in the backlight. Follow this guide to replace your backlight.

Fix stuck pixel . If only a few pixels are “stuck” in a certain color and other parts are still functioning normally, the repair will be quite simple. Let the screen run and try:

• Cover the tip of the pencil with a soft, damp cloth (or any other small, blunt tip). Rub the stuck pixel gently: too hard can make the problem worse. ^[1]
• Search online for stuck pixel editing software. With these software, the display color will be changed continuously to shock the pixels and help them work again.
• Buy hardware to plug in a monitor and fix dead pixels.
• If none of the solutions work, it may be time to replace the screen.

Try fixing spider web cracks and black streaks. They are signs of physical damage. Usually by this time, the screen is no longer repairable and the repair attempt will likely make things worse. However, if the screen is currently unusable, testing the milk before replacing it will not hurt:

• Use a soft cloth or other object to scrub your screen. If you feel a crack in the glass surface, do not attempt to repair it. Please replace the screen with a new one.
• Gently scrub the scratch with the cleaner. Clean the eraser when dirt builds up.
• Buy LCD screen scratch repair kit.
• Read more about homemade scratch removers.

Replace the screen. If you are using a removable LCD monitor, you should consider replacing it. Doing so will probably be more economical than replacing the old screen with new components with a shorter lifespan. As for a laptop or relatively new device, you should buy an LCD display panel and use a professional installation service.

• The display panel’s product code will be written somewhere on the device, usually on the back. Use this code to purchase a new board from the manufacturer.
• Although you can try to replace the LCD display panel yourself, this is not a simple process and the risk of shock is also very high. Follow the instructions specific to your product line to ensure safety and maximize your chances of success.

Try fixing other errors. Broken LCD can be due to many reasons. The diagnoses above only consider the most common problems. Try the solution that is appropriate for your screen condition first. If you have other problems, or if after trying to fix the screen still won’t work, you may be experiencing one of the following:

• If there is a response to the input signal but the displayed image is distorted, such as a mixed colored square, the AV board may be damaged. It’s usually a rectangular board located near the video and audio cables. You can either replace the visible damaged part with a soldering iron or install a new AV board and carefully insert the ribbon cable and original screws.
• Maybe the fault lies in the main control button. Clean them with a metal cleaner or a gentle brush to fix the loose connection. Identify the microchip connected to these buttons and re-solder the broken connection if necessary.
• Check if the input cable is broken or try another cable of the same type. Check the microchips connected to them and re-solder broken connections if necessary.