Eventually, the material starts to crack, leading to intermittent connections. At least at first, the problem tends to be worse when the laptop is cool because as it heats up, the expansion tends to force the bumps into better contact with the underfill. It's very unlikely to be an issue in the display because the red dots move with the windows Firstly, hard restart your laptop computer. To do so, press the power button for about 3 to 5 seconds and power it on again. Next, remove all the attached peripherals and also unplug the power connector. If you have a laptop with an external battery, push the switches in opposite direction. Then, carefully pull it out. Aju krishna, could be the LCD panel or the GPU. Connect an external monitor. If that show a good picture you know it is most likely your LCD panel that needs replacing. If the external monitor is showing the same issues, you have having problems with the GPU on the logic board and will have to at least disassemble your laptop to inspect. To choose a new refresh rate for your LCD monitor in Windows, begin by clicking on Start > Control Panel > Appearance and Personalization > Display. If you are on Windows 8 or 10, just right-click on the Start button and choose Control Panel. If you’re in icon view, you can click directly on Display. On the left hand side of the window, click 1. If it's an entire column of dead pixels it may be the connection between the laptop and motherboard is bad or needs to be reseated. Also, dropping the laptop or other physical damage, such as liquids, could cause this. I've never had a monitor or LCD develop bad pixels on its own. At my workplace we have some laptops that are over 5 years mQCDzo.

laptop lcd cable problems