Acer AL2051 AL2051W Service Guide - Page 37

2. Power Board No power No power Check AC line volt 110V or 220V NG OK Check AC line Check the voltage of C904(+) OK NG Check start voltage for the pin3 of IC901 OK NG Check F901, bridge rectified circuit
Check R903, R904,IC901 Check the auxiliary voltage is between 10V-16V OK NG Check D904, D905,IC902 Check Q902,Q903 Check T901, D902 37