Open phones, cleaning and welding the display interface, is not valid. Power on boot, 1~15 pin voltage measurement Figure 5 interfaces were normal, remove the cable, use a multimeter check cable plug to the display of each foot individually, plug 1 foot and the display of the discovered 31 feet doesn't make sense, prove that the cable has broken. Paint line will both fly-wire connection, commissioning, normal, troubleshooting.S48service manual download site