According to Appleinsider, a class action lawsuit announced on Wednesday showed that Apple’s MacBook Pro had design defects that could cause backlight problems on some devices. < / P > < p > the problem was discovered as early as 2018, mainly manifested by the dark patches on the bottom of the MacBook Pro display, which is similar to the lighting devices commonly used on theater stage. Some users have reported that turning the MacBook Pro display at an angle can cause the screen to malfunction. < / P > < p > ifixit investigation found that a flexible cable in MacBook Pro was the “culprit” in the whole incident. This cable is used to connect the monitor to the controller on the logic board below the MacBook Pro touch bar. According to the content of the lawsuit, the flexible cable has defects, and the related problems will gradually worsen as the connected display is turned on and off. < / P > < p > although Apple finally launched a maintenance plan covering the 13 inch MacBook Pro models in 2016, it did not include the 15 inch pro and those made after 2016 facing the same problems. As a result, some affected users are forced to pay the relevant maintenance costs. Because flexible cable is an essential display component, it is necessary to replace the whole screen component to solve this problem.