One of the more notorious problems encountered in older LCD TVs is the no video/not powering up problem caused by bad capacitors in the power board module. Usually you’ll get the LED power indicators to light up when turned on but LCD screen stays dark and no picture comes out. Of course there may be other causes but one of the things you should check first is the power board and look for blown capacitors. This was the case for the LCD TV in this video. It was a Polaroid TDA-03211C You can determine a capacitor is bad or blown when it shows a bulge at the top. Sometimes it will be obvious but as the video indicates, sometimes the bulge will be very slight so you’ll probably need to familiarize yourself with how good capacitors look so you’ll have a baseline.
Related: Repairing a Vizio TV with no video problem— it powers up but screen is blank and won’t turn back off
You’ll need some soldering skills but it’s fairly an easy fix. You’ll want to make sure you can reassemble the unit back together once you take them apart so you’ll want to think that through if you’re new to this. You can draw the LCD TVs back panel on paper and mark the screw locations as well as important components that you shouldn’t forget about as that can help you in the reassembly process.
(Credit: Bafury sutto of Youtube)
The above video talks about replacing only two bad capacitors but if you find other ones that need replacement like the ones under the heat sink, you’ll need to get a little bit more surgical. If you need help with removing the heat sink you could check out the video below which shows how to get replace more parts on the power board. The TV looks like a different model but power board is similar. This one’s a 2-part video.
Part 1
(Credit: Tampatec of Youtube)
Part 2
(Credit: Tampatec of Youtube)
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