Hi David,I looked & ng.I guess I'd either pulse the gate of switcher[never float it of course] or intermittently ground drain thru,say 100K resistor and follow the change thru SMPS.Good luck this fine Sunday-let me know Pete David Lessard <mr_fixit@xxxxxxxxxxxx> wrote: G'Day Gentleman, This TV is still quite new, October 2004 manufacturing date. Set came in DOA after a lightning storm, found and replaced the following shorted/leaky parts: IC501 - Opto in SMPS - Internal LED shorted - Replaced with PC817 Opto D517 - Zener - Marking B4.7 - Shorted - Replaced with 4.3V Zener D515 - Small Glass Diode - Replaced with IN4148 Q507 - 2SC3198 - Leaky - Replaced with 2SC1815 (NTE85) Q502 - 2SC3198 - B-E Shorted - Replaced with 2SC1815 (NTE85) All these bad parts are in the SMPS/Opto circuitry. Still SMPS doesn't fire-up at plug-in. I don't see any switching signal at gate of (main) SMPS FET. +B is present (160VDC), HOT is not shorted, checked ALL diodes and transistors in SMPS circuit. Not sure where else to start looking, also not sure if zener marked B4.7 is a 4.7V zener, common sense tells me it is though. Does anyone have this service manual? I really don't want to buy a $40 manual for this $89 TV. Thanks in advance, God bless all of you! David Lessard Mr_fixit@xxxxxxxxxxxx Alexandria, Ontario, Canada K0C-1A0 ----------------------------------------------------------------------------- This Email List is Public. Remove: http://www.tech-assist.org/remove.htm Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/ Peter Neal Neal Electronics 1905 E. Wm.Cannon Austin,TX 78756 ----------------------------------------------------------------------------- This Email List is Public. Remove: http://www.tech-assist.org/remove.htm Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/