1. The whole screen does not brighten up or panes appear on it, to check
" if the host is started
" if the communication line is connected well
" if the transfer card is plugged in
" if the data line between the multimedia card, acquisition card and transfer card is connected well
" The position of receiving card JP1 or JP2 is incorrect

" Power on the host
" Connect the communication line properly
" Plug in the transfer card again
" connect well the data line between the multimedia card, acquisition card and transfer card
" adjust the position of JP1 and JP2 switch
" if the computer display is protected or if the display area of display screen is black or pure blue. (Synchronous screen)
2. The system will prompt every time LED studio is started that it cannot detect the data line signals between the Control System COM port and data transfer card. The cause is that the acquisition line is not connected or the COM port of computer is damaged. Just connect this data line well or replace the computer.
3. The images in the whole screen are shaking or ghosting, to check

" the communication line between the computer and large screen.
" DVI line of multimedia card and transfer card.
" the transfer card is out of action.

" re-plug in ore replace the communication line.

" reinforce DVI line 冲插

" replace the transfer card.

II. Driver Section

1　The unit does not brighten up.
The horizontal directions of successive few units do not brighten up, please check if the flat cable between the normal unit and failed unit is connected well;
or if Chip 245 works well.
The vertical directions of successive few units do not brighten up, please check if power supply for this line is well.
if power is supplied to +5V power of GND
if +5V and GND are in short circuit
2　The previous line of unit of the line of one corresponding module does not brighten up or display unusually, to check

"　if the pins of line signals for the corresponding module are loosely welded or openly welded;

" if the upper and lower resistances of its line signals are not welded or openly welded.

3. Two lines of one unit turn on at the same time (one line turns on normally and the other turns on permanently upon displaying texts), to check
　"　If signals in two lines corresponding to the module are in short circuit

4. Red or green in the upper or lower section does not brighten up or display unusually, the unit has no colors, to check

" if 245 R.G B data is outputted.

" if the normal 595 output pin and abnormal 595 input pin are connected.

" if input stick works normal or it and GND. +5V are in short circuit.