Repaired No Power Problem In HP VS19e 19″ LCD Monitor
This HP VS19e 19″ LCD Monitor was repaired by other electronic repairer because i could see the soldering mark on certain part of the power supply section. When i power”On” and then “Off” it i tested that the big filter capacitor doesn’t discharge at all. That means the high voltage (about 300 Vdc) remains in the filter capacitor. Normally for a good power supply, the filter capacitor voltage will discharged by the start up resistors. I have tested few of the start up resistors and seems to be okay.
After completed testing all of the suspected components in the primary and secondary section i concluded that it was the power IC SG6841SZ problem that had caused the filter capacitor still storing charge even though the equipment is already off! replacement solved the no power symptom in the HPVS19e 19″ LCD Monitor.