Acer AL1906 AL1906 Service Guide - Page 34

2. No picture (LED is orange) No picture Measure U701 PIN2=3.3V U702 PIN2=3.3V OK NG X401 oscillate waveforms are normal OK NG Replace U701, U702 Replace X401 Check if the sync signal from computer is output and video cable is connected normally NG OK Replace U401 Input the sync signal of computer, or change the cable 33