Acer AL2051 AL2051W Service Guide - Page 34

Troubleshooting This chapter provides troubleshooting information for the AL2051W: 1. Main board No power Chapter 4 No power Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100-240 is normal OK NG Measure U703 PIN2=1.8V U705 PIN2=3.3V NG OK X401 and X402 oscillate waveforms are normal OK NG Replace U402 NG Replace U401 Reinsert or check the Adapter/Inverter section Check CN201 or replace U703, U705 Replace X401, X402 34