Proscan PS61700 Beeping no picture

please give me a schematic drawing of the unit. please give me a schematic drawing of the unit.

I have the same problem with my Proscan PS61700; dead with a buzz. I have some experience with TV repair and have determined the horz output xsistor is shorted and most likely the flyback is bad, since the power supply tries to start.



So one may ask then why am I posting this if I know what's wrong... Well an experience technician said he has had no luck fixing this chassis, RCA type as well. He has repeatedly replaced flybacks and had several units come back with the same problem a week later of sometimes 3 months later. He recommended not to fix stating that the replacement flybacks are not to spec for some reason and this chassis seems to be the only one.



So my question is: has anyone seen this issue with the flybacks repeatedly failing for defective reasons OR is there something else that has failed causing the flybacks to possibly over-heat and fail again.



Thanks for the help in advance,

Frank I have the same problem with my Proscan PS61700; dead with a buzz. I have some experience with TV repair and have determined the horz output xsistor is shorted and most likely the flyback is bad, since the power supply tries to start.

So one may ask then why am I posting this if I know what's wrong... Well an experience technician said he has had no luck fixing this chassis, RCA type as well. He has repeatedly replaced flybacks and had several units come back with the same problem a week later of sometimes 3 months later. He recommended not to fix stating that the replacement flybacks are not to spec for some reason and this chassis seems to be the only one.

So my question is: has anyone seen this issue with the flybacks repeatedly failing for defective reasons OR is there something else that has failed causing the flybacks to possibly over-heat and fail again.

Thanks for the help in advance,
Frank

I have a RCA P56926 with the same problem. It happened just after a close lightening strike.



Has anyone ever figured out how to repair this problem? I have a RCA P56926 with the same problem. It happened just after a close lightening strike.

Has anyone ever figured out how to repair this problem?