====Shot Clock Display Issue Detect ====
|                                   Shot clock phenomenon                                                  |    Description of the phenomenon    |    Analysis    |
|{{ wiki:misc:shot_clock_screen:picture_1.png?400*400 }}|Connect the device and power it on. Neither of the shot clock screens lights up    |The main control card of the console is abnormal          |
|{{ wiki:misc:shot_clock_screen:picture_2.png?400*400 }}|Connect the device and power it on. One of the shot clock screens does not light up    |There is an abnormality in the communication cable that does not turn on the screen.          |
|{{ wiki:misc:shot_clock_screen:picture_3.png?400*400 }}|Connect the device and power it on. The shot clock finished its self-test procedure (each segment on the numeric light on one by one) normally and displays the word "8". After 10 seconds, the screen displays the word "0".If the scoring software has already opened the match, one of the screens will show "0".    |The word "0" is displayed. The in-screen cable may fall off or the in-screen control card may be abnormal.            |
|{{ wiki:misc:shot_clock_screen:picture_4.png?400*400 }}|Connect the device and power it on. The shot clock finished its self-test procedure (each segment on the numeric light on one by one) normally and displays the word "8". After 10 seconds, the screen displays the word "0".If the scoring software has already opened the match, the screens will show "0".    |It means that the console master card is abnormal or the in-screen control card is abnormal.           |
|{{ wiki:misc:shot_clock_screen:picture_5.png?400*400 }}|Connect the device and power it on. The shot clock finished its self-test procedure (each segment on the numeric light on one by one) normally and displays the word "8". After 10 seconds, the screen displays the word "0".Shows the time of the game and shot clock(If in basketball game mode).    |The screen will display a normal screen. The screen is functioning normally             |

====Shot Clock Main Controller Issue Detect ====
{{ wiki:misc:shot_clock_screen:main_controller_1.png?500*300 }}
Open the shot clock backplane and find the main control card

{{ wiki:misc:shot_clock_screen:main_controller_2.png?500*300 }}
==Situation 1==
When powered on, the three LED will flash three times. 
  D1:does not flash.
  D2:flashes.
  D3:flashes.
Analysis:The control card is working normal.

==Situation 2==
  When powered on, the three LED will flash three times. 
  D1:does not flash.
  D2:does not flash.
  D3:flashes.
 Analysis:The input data is parsed abnormally.

==Situation 3==
  When powered on, the three LED will flash three times. 
  D1:does not flash.
  D2:does not flash.
  D3:does not flash.
Analysis 1:If it is a wireless connection, you need to change it to a wired connection and test it again. If the result is still the same
The main control card is abnormal, and the data cable may be abnormal or the main control card needs to be replaced