The machine is damaged due to dropped once before, estimates were more likely to damage the display, replace the display troubleshooting.CT4service manual download site
Note When replacing the display, screen is divided into two versions, different versions cannot be generic, an interface wiring more sparsely, this older version, another outlet wiring denser, with a new version, replace, make sure to distinguish. In addition, the installation screen, the screen and motherboard interface must be installed, if tilting can cause interface circuit, are likely to burn out CPU.CT4service manual download site