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z No signal issue (Composite, SV, YCbCr, YPbPr) No signal Check if the signal source is available and been well connected? No Enable source and connect the signal wire properly. Yes Check if the PCB-I/O has been well connected to the PCB-Main? No Connect the PCB-I/O properly. Yes Test again Take off the back cover. No Check if Wire Ass’y 31P has been well connected to PCB-Main? Connect Wire Ass’y 31P properly to the PCB-Main. Yes No Change the PCB-I/O then check the signal Yes 22 Change PCB-Main board
