Acer AL1706 AL1706 Service Guide - Page 33

2.3 Output power is unstable Unstable power Check sampling Circuit YES Check the R pin voltage of IC803 about 2.5V YES Check pin1 of IC802 voltage is 5.8V NO Check R810, R811,R818 NO Check the C pin voltage of IC803 if 3V YES Check R809, R808, R814, D809 NO Check D806, C815 if short NO Change R810, R811, R818 NO Change IC803 Change D806, C815 YES Check pin3 of IC802 voltage about 1V YES END NO Change R801, R805, R822, R823, R817 2.4 Backlight can't be turned on 33