6. Replace other identical signal cable ( VGA / DVI / HDMI / DisplayPort / USB) and try again, and make sure the cable version is suitable for the monitor's port. If there is other screen or PC, try it to confirm whether the screen is normal. That can help us identify the symptom more efficiently. On looking through the forums i came upon some tests to isolate the problem. I tried: 1. The LCD BIST (Built in self test) : Passes. All colors are displayed with no distortion of any kind. Crystal Clear display. 2. Connect Laptop to an External Display : Pass. I connected to a VGA Monitor. Check for and install Windows updates. Update your video drivers to the latest version. Check your monitor resolution settings in Windows. Try connecting using a different cable. Higher quality cables are generally more reliable. Test to see if the picture looks right in your BIOS. If it does, this could indicate a problem with the video driver Mike Eller, color problems usually indicate that the power supply, inverter board and the backlights are working fine and the real cause is either in the main board, loose cable (wire or flex cable),or a controller board (LCD panel) problem. The color and brightness of yours looks fine, the - Samsung Galaxy Note 10.1 This Dell Inspiron 15 (3521 / 5521) video repair tutorial was brought to you by http://www.parts-people.com SHOP FOR DELL INSPIRON 15 (3521 / 5521) PARTS: LC What to Know. Check power and cable connections. Turn monitor's brightness and contrast settings completely up. Connect different working monitor. If it doesn't, check for issues like disconnected or faulty video card. Test original monitor with data cable known to work. If nothing else works, replace monitor. .

laptop lcd cable problems