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If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" or the STR number of your device, in the "Search box at the top right of the Homepage" to get gathered related posts.
maybe the electron gun had gone south? tube is dead? check with a technician to get full diagnosis. You may still be able to get part if a repair is needed
good luck
Having had that problem myself with another brand I would say that either your CRT or Video board has gone out, The board can possibly be repaired but the CRT would need replaced.;
Hello
You just goto the system option, through its menu, and set the system to auto. I don't know about the transmission system in Phillipenes. Changing system to auto will allow the TV to receive any system transmission. Ok
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