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4. TROUBLE SHOOTING
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4.14 Main LCD trouble
Main LCD control signals are generated by T20.
Signal path : T20 -> LVDS transmitter -> LCD Module
(T20 and LVDS transmitter are located in AP board)
Is the circuit
powered?
Press Power key Turn the
power on
Disconnect and reconnect
LCD connector
Change AP board
LCD works well
THE END
Change LCD
module
LCD display OK?
Check power
VDD_WLED
VDD_3V3
Follow the power on
Trouble shooting
No
Yes
Yes
Yes
Yes
No
No