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Chapter 4
AT3720A Troubleshooting Guideline
1.
Can not power on
Check Power code
Power code
Plug in?
Replace Power board or Main board
Or IO board or All cable
/
LED Bright?
Replacement Panel
A
Replacement M/B
END
no
LED Bright
Green color ?
Check Remote control
and keypad ?
OK
Replacement Remote control or
IR board or Keypad board
NG
Replacement Cable
Check M/B
no
no
no
LCD Panel
can Display ?
no
Check panel’s
all cable
Replacement M/B
