Problems are part of product development cycle, even for a top product like Galaxy Note. Due to new technologies developed and integrated in devices, in various situations can be found problems which are not detected by the manufacturer or are not taken into account in testing phase. Samsung is a company that respects its customers, and in turn, customers have high demands for company products.
Even if appears screen problems, the first thing that should be considered is the upgrade to latest Android firmware which is 4.0 (Ice Cream Sandwich).
Screen problems occurred due to integration of the new AMOLED display system for a screen with such dimensions. Among the problems reported by users include blocking of pixels, darkening of the screen only in a certain part, displaying low color intensity, or displaying colors like green-blue-pink where should be displayed white.
Blocking of pixels during runtime of video file could have as problem source the media player, but not always. To determine if the device is affected by the video player, you can download other video player from Android Market.
For colors which are not displayed correctly you can try to stop using the screen option – ‘auto adjust screen power’, and manually adjust the brightness to a satisfactory value.
According to t3.com, a user named Supercurio created several applications that may come to help users to detect screen errors.
An application is – Voodoo Screen Test Patterns – can be used to detect colors errors on the screen. The second application is – Voodoo Display Filter – also can detect other problems of the screen.