AB HMI maintenance: AB HMI maintenance, AB HMI resolves common faults: black screen, the video, the video, the touch screen does not respond or is slow to respond (bad touch), the contents of confusion, can not enter the system interface, no backlight, backlight dark, backlit no characters, no communication, no response buttons; AB HMI common models: 2711-PT7C15A2,2711P-K4M20A, 2711P-K4M20D, 2711P-K4M3A, 2711P-K4M3D, 2711P-K4M5A, 2711P-K4M5D, 2711P-B6C1A, 2711P-B6C1D, 2711P-B6C20A, 2711P-B6C20D, 2711P-B6C3A, 2711P-B6C3D, 2711P-B6C5A, 2711P-B6C5D, 2711P-B6C8A, 2711P-B6C8D, 2711P-B6M1A, 2711P-B6M1D, 2711P- B6M20A, 2711P-B6M20D, 2711P-B6M3A, 2711P-B6M3D, 2711P-B6M5A, 2711P-B6M5D, 2711P-B6M8A, 2711P-B6M8D, 2711P-K6C1A, 2711P-K6C1D, 2711P-K6C20A, 2711P-K6C20D, 2711P-K6C3A, 2711P-K6C3D, 2711P-K6C5A, 2711P-K6C5D, 2711P-K6C8A, 2711P-K6C8D, 2711P-K6M1A, 2711P-K6M1D etc; 2711P-K6M20A, 2711P-K6M20D, 2711P-K6M3A, 2711P-K6M3D, 2711P-K6M5A, 2711P -K6M5D, 2711P-K6M8A, 2711P-K6M8D, 2711P-T6C1A, 2711P-T6C1D, 2711P-T6C20A, 2711P-T6C20D, 2711P-T6C3A, 2711P-T6C3D, 2711P-T6C5A, 2711P-T6C5D, 2711P-T6C8A, 2711P-T6C8D , 2711P-T6M1A, 2711P-T6M1D, 2711P-T6M20A, 2711P-T6M20D, 2711P-T6M3A, 2711P-T6M3D, 2711P-T6M5A, 2711P-T6M5D, 2711P-T6M8A, 2711P-T6M8D, 2711P-B7C15A1,2711P-B7C15A2,2711P -B7C15B1,2711P-B7C15B2,2711P-B7C15D1,2711P-B7C15D2,2711P-B7C4A1,2711P-B7C4A2,2711P-B7C4B1,2711P-B7C4B2,2711P-B7C4D1,2711P-B7C4D2,2711P-B7C6A1,2711P-B7C6A2,2711P-B7C6B1 , 2711P-B7C6B2,2711P-B7C6D1,2711P-B7C6D2,2711P-K7C15A1,2711P-K7C15A2,2711P-K7C15B1,2711P-K7C15B2,2711P-K7C15D1,2711P-K7C15D2,2711P-K7C4A1,2711P-K7C4A2,2711P-K7C4B1,2711P -K7C4B2,2711P-K7C4D1,2711P-K7C4D2,2711P-K7C6A1,2711P-K7C6A2,2711P-K7C6B1,2711P-K7C6B2,2711P-K7C6D1,2711P-K7C6D2,2711P-T7C15A1,2711P-T7C15B1,2711P-T7C15B2,2711P-T7C15D1 etc; 2711P-T7C15D2,2711P-T7C4A1,2711P-T7C4A2,2711P-T7C4B1,2711P-T7C4B2,2711P-T7C4D1,2711P-T7C4D2,2711P-T7C6A1,2711P-T7C6A2,2711P-T7C6B1,2711P-T7C6B2,2711P-T7C6D1, 2711P-T7C6D2,2711P-B10C15A1,2711P-B10C15A2,2711P-B10C15B1,2711P-B10C15B2,2711P-B10C15D1,2711P-B10C15D2,2711P-B10C4A1 etc; 2711P-B10C4A2,2711P-B10C4B1,2711P-B10C4D1,2711P-B10C4D2,2711P -B10C6A1,2711P-B10C6A2,2711P-B10C6B1,2711P-B10C6B2,2711P-B10C6D1,2711P-B10C6D2,2711P-K10C15A1,2711P-K10C15A2,2711P-K10C15B1,2711P-K10C15B2,2711P-K10C15D1,2711P-K10C4A2,2711P-K10C4B1 , 2711P-K10C4B2,2711P-K10C4D1,2711P-K10C4D2,2711P-K10C6A1,2711P-K10C6A2,2711P-K10C6B1,2711P-K10C6B2