Acer AL512 AL512 Monitor Service Guide - Page 28

AL512/513 Service Manual 10.2. NO DISPLAY No Display Check Power region Dark Amber Check LED Color Check IO cable is Yes connect OK ? Green Amber & Green Check X100 Crystal 12MHz is working? Check I/P signal is in pwr saving state? No Check I002 is OK ? Refer to NO POWER trouble shoot flow char Press Power key ON/OFF is OK ? No (See LED is green or dark.) Yes Check uP I105 Yes Reset is Ok ? Change I105 Yes Press "1" key if OSD No menu is on display ? Yes No Check Reset circuit Q113,D113 Check Keypad pcb is OK ? Yes Check if No Inverter is Ok ? Change Inverter Check I001 MVZ if RST Pin#155 have reset pulse ? Yes No Check uP I105 pin#24 send reset ? pulse ? Yes Check X101 Crystal No 12MHz is working ? Yes Change X101 Check J105,J106 No data bus have signal Change I001 LCD controller IC Yes Check panel Powers VDDD=3.3V VDDA=9.2V VDDG=18V VEEG=-6V Yes Change LCD panel -27- 9/20/2002