Acer AL1751 AL1751 Service Guide - Page 36

5. Inverter Board No Backlight Check CN801 Pin1 =12V OK NG Check adapter Check ON/OFF signal NG OK Check U801 PIN3 voltage is normal? OK NG Check U801 PIN18 triangular wave is normal Check Interface board Check Q804,Q803,Q802 circuit NG OK Check C816, C821 Check U801 PIN11, 12, 19, 20 NG OK Check U801,Q801, Q805, Q806, Q807 Check D801-D804, D811, D805, D810, D808 36