Main & Key Led Trouble - LG CF360 Service Manual

4-8. Main & Key LED Trouble
to turn on the power
Is the circuit powered?
YES
Keypad Backlights Works?
( Main : LD501~LD504, Key : LD100 ,LD101,LD104,LD105,LD106,LD109)
Keypad Backlights Works?
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Only for training and service purposes
START
Press END Key
YES
NO
Resolder or Change backlights LED
YES
Finish
NO
Follow the Power On Trouble
Follow the Power On Trouble
NO
Change Main Board
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4. TROUBLE SHOOTING
Shooting
Shooting
LGE Internal Use Only