Universal 32″ TV Wouldn’t ‘Power On’
This TV was brought to me with complaints of not powering on. This TV had been repaired by me before (see article 23/2/22). I opened the back case, did physical observation, no sign of any faulty components, so l did voltages test on the combo mother board at various points, these were present: 12V, 5V, 19V, 3.3V, 12V,1.16, but 1.8V was absent.
So I checked on mosfet responsible for switching on 5V to voltage regulator, which in turn generate 1.8V, this fet was good. So I suspected voltage regulator may be faulty, I replaced the 8 pins voltage regulator with a new one.
Then assembled everything together and powered on tv set: wowed it came on beautifully.
This’s the finished repaired work.
This article was prepared for you by Imoudu Onwumah from Nigeria. He is 62 years old and has just 3 years experience in electronics repairs. I started career in hotel industry as a chef, but then I was doing repairs only in electrical repairs as a hobbyist. In 2018, I decided to learn about electronics which through Jestine’s electronics e-books and holding my hand, am an electronics techie today.
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Note: You can read his previous article on TV Power Buttons Got Stuck