This kind of failure should be starting from the power circuit. To measure dc + 24 v, + 5 v, + 12 v, 12 v voltage no output; Measuring CN31 (1), (3) feet between voltage of ac 220 v, the voltage is normal. After power off and check Fl01 in good condition, check respectively C107, UR1, RT101, VF (E) 101, Tl01 and related components, found that the filter capacitor C107 is punctured. After replacing C107 boot test, fax machine work is normal, troubleshooting.F5Xservice manual download site