6. Troubleshooting6-1 Main6-1-1 Power MalfunctionSamsung Electronics6-1YesNoYesNoYesNoNoYesLCD lamp is ONPower Transistor(RQ705) & fuse normalPins 73,31 ofUIC1(LC72362)is at 5VConnectionand solderingof SCON1-UCON1are normalCheck Voltage at RIC1Replace RQ702,RQ703Replace RQ701Voltages atRQ702,RQ703are normalVoltage atRQ701 is normal