Acer AL1732 AL1732 Service Guide - Page 28

2. No Characters , Missing one color No Change Inverter Board Check Inverter From Scaler board OK ? No Check or Change Cable Or Panel No Change VGA Cable No Characters Missing one color Check CN1 12Vdc Output OK Check L4 5Vdc Output OK Check U2(pin2) 1.8Vdc Output OK Check U3(pin2) 3.3Vdc Output OK Check CN3 to Panel Signal Output OK Check X Tal 14.318 Mhz ? OK Check H , V SYNC ? OK Change U4 No Change Adaptor No Check or Change U1 , Q1 , D3 No Check or Change U2 No Check or Change U3 No Change X1 - 28 -