What is the deffective of my tv has no power. ST-21se1?

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http://electronicshelponline.blogspot.com/
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This may help :
https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiw0bOn0cLNAhXEAsAKHf2XCf8QFggcMAA&url=http%3A%2F%2Fwww.eserviceinfo.com%2Fdownloadsm%2F56109%2FSanyo_ST-21SE1.html&usg=AFQjCNFuoVI3qKhoM6JaGuoWBKsbC3fRcA&bvm=bv.125596728,d.ZGg

If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Flyback transformer data is given. Search the site with the keyword "Flyback Transformer". Type in these words in the search box located at the top right of the display window.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Send your email ID to me by Fixya, and get back a copy of the schematic by return mail.

The problem of your TV is in the power supply section.Maybe the regulator is deffetive thats why the power supply not comes on.Its maybe also the harizontal output transistor is deffective.So check the regulator an harizontal output and replace if deffective..

Power supply problem,Maybe theres a deffective parts in the power supply like the regulator transistor or deffective harizontal output.

usually after 4 or 5 yrs EHT ( transformer that supplies voltage to tube ) becomes weak - then TV won't get ON.. means no picture no sound but LED blinks - in some cases (like yours) it will take few mins for TV to get ON - in some TVs along with EHT 1 or 2 components like resistor, transistors, etc will also gets deffective - so solution is TV circuit board has to be checked to find whether only EHT is deffective or other components are also deffective - in your case only EHT is deffective - price of EHT will be between Rs.250 to Rs.600 - iam service engineer (computers, laptops, printers,etc) - bangalore - domlur - 09986222774 - [email protected] - if you are in bangalore then you can call me for service