subject: How To Repare The Whole Led Display [print this page] ummary: the whole led display is not working 1, detection of power supply is energized. 2, testing communication lines are connected, with or without a wrong. (Sync screen) 3, synchronized screen test card sent cards and receive communications without blinking green light. 4, whether the protection of computer monitors, or Led display display area is black or pure blue.
Whole led display problem:
A. Whole led display off (blank screen)
1, the detection of power supply is energized.
2, testing communication lines are connected, with or without a wrong. (Synchronous screen)
3, simultaneous detection screen card to send and receive communications green card without blinking.
4, whether the protection of computer monitors, or display shows the area is black or pure blue. (Synchronous screen)
B. Whold module of led display is not working (black screen)
1, continuous transverse direction of a few panels off, checked the normal and abnormal cell plate cell plate between the cable connection is connected; or chip 245 is normal,
2, for a few longitudinal direction panel does not light, check this out power supply is normal.
C. Led display board unit is off line
1, check the line and 4953 feet if the output pin through.
2, the check 138 is normal.
3, check whether the hot or burning of 4953.
4, check whether there are high 4953.
5, check whether the control pins 138 and there through 4953.
D. Led display unit board does not shine
1, the check 595 is normal.
2, corresponding to pass inspection from top to bottom the foot is connected to the module.
3. Check the led display after restart
4, Charles 595 output pin to the module foot is through.
E. cell board lack of color
1, 245 R.G check whether the data are output.
2, the investigation of normal and abnormal 595 out of 595 feet if the input pin through.
3,After checking and repaired , restart the whole led display
