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I have a 74cm sinotec crt tv with vertical line in center with no picture only audio

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Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Type in this key phrase " my service table today " in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result might display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.

Posted on Jan 05, 2017

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Posted on Jan 02, 2017

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My Sinotec LCD tv its having a problem when I switch it on it 1st gives funny red lines from there shows pictures halfly with dark picture on the bottom that can a day or two when it wants or some hrs...


Hi! this is jessie, i can help u solve the problem of your Sinotec LCD TV. Just check the following components inside :
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I noticed a bright horizonal line about 1/4 in.wide centered in the middle running from side to side. Audio is fine. This just all of a sudden happened it was not gradual. it is due to vertical section failure. please minimise bright to protect crt. solution. solution 1 check supply to vertical section. 2 check for ic failure in vertical section 3 check vertical output section parts. Is it fixable or dumpable?? Please HELP!!!! yes it is fixable it is common problem not major one. good luck.

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