1, the screen appears black or color horizontal or vertical bars, is generally the LCD line problem, although the screen may look only one, but because the LCD line is directly connected to the display glass mirror, once broken it is difficult to repair, unless it is a professional and technical personnel. In this case, you can only return to the factory and replace the hardware.
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2, boot or use the occasional font or image garbled situation, may be due to the Bug of the software version, may also be the CPU or font library, flash memory and other damage, the former can be solved by brushing the firmware, but the latter needs to be repaired, also need to return to the factory;
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3, if the screen appears cloud-like spot flower screen, then there is no doubt that the LCD screen is damaged, only replacement, there is no possibility of maintenance.