Acer AL2051 AL2051W Service Guide - Page 35

No picture (LED orange) No picture The button if under NG X401oscillate NG Replace X401 control waveform is normal OK Measure U703 PIN2=1.8V U705 PIN2=3.3V OK OK Check reset circuit of U402 is normal OK Replace U402 NG Check Correspondent component X402 oscillate waveform is normal OK NG NG Replace U703, U705 Replace X402 Check HS/VS from CN407 is normal NG OK Replace U401 Check Correspondent component 35