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My Sinotec 42 inch TV Model MP 421 MANUFACTURED jULY 2007 takes up to 15 minutes for the picture and the sound to come on after switching on with the remote control small blue light on what is the problem?

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The start voltage to its SMPS [power supply regulator] section has the fault. Contact any service technician. One or more resistors on the start stage should be checked for value deteriorated.
http://electronicshelponline.blogspot.com/ If you wish to get some details, check this link.

Posted on Dec 26, 2013

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Posted on Jan 02, 2017

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SOURCE: JVC 42 INCH PLASMA POWER LIGHT BLINKING ONLY NO PICTURE

no kidding? what is the problem so prevelant in this unit? obvious design flaw.

Posted on Jul 26, 2008

  • 3 Answers

SOURCE: 42 inch LG Plasma TV - Lost picture

Our LG 50" plasma tv screen went black after a popping noise but still had sound, after great diliberations decided to take the back off and have a peek!
We unplugged the tv and tested the fuses (there were three we could see) one had blown, the one on the left as you look at the back of the tv it also has one above it. We wrote the code/seriel number down and took the fuse to the electrical wholesalers Maplin and bought a pack of 10 fuses for £1.29 replaced the fuse in the tv and everything now fine!!!!!!
Hope this might be of use to anyone whose lost the picture after a loud popping/snacking noise but still has sound.

Posted on Jan 17, 2008

  • 1 Answer

SOURCE: My tv remote for bush 42 inch lcd model number

Hi ive just had exact same problem phoned customer services and was told it is a child lock all you have to do is hold down the menu button on the tv for at least 20 seconds and all is cured

Posted on Oct 28, 2010

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I have a 42 inch 127cm sinotec full hdtv model mp-42nt what do i need to watch tv


Plug it into AC mains wall socket, and switch it ON. Refer the user manual for more details. What else to do?

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The TV is locked [Tuning lock]. You should unlock it. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

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More than likely your t.v has bad capacitors that power up the light bulbs that light up the screen. I had the same problem with the same t.v. and replaced two bad capacitors and that solved the problem. Take the back off of the t.v. and look for capacitors that are bulged at the top. The capacitors have the model number on the side. I found replacement capacitors at www.digikey.com for a very low price. Here is a video that you can watch on how to replace the capacitors. https://www.youtube.com/watch?v=YCSNWi3UHf4

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1 Answer

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Need more info on the unit.
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