I have been using a Grundig Vivance LCD TV since 2008 and it had recently developed a fault that had a symptom of screen flickering continuously. I have had no issues with this TV for more than 10 years so it had worked quite reliably and as a result I was unable to make the expenditure to buy a new one.
So just when I thought, finally time to buy a new one, my curiousity got the better of me :). I decided to investigate and wanted to look inside. Generally, a TV screen flicker is attributed to power supply capacitor(s) issue. I then opened up the TV, like so:
The power supply board/section is easy to spot because it starts where the electrical inlet power plug is inserted. Please make sure you have disconnected the power supply :), an obvious precaution. In this TV, the power supply section is a separate board which is shown on the right hand side in the above image. I then opened up the Faraday metal cage around the power supply board and show zoomed-in photos as follows:
I then further zoom in to see how the capacitors were doing:
Did you spot what I was suspecting? Have a look in the photo below, one of the capacitors has become a bit bloated and also leaked something out.
That is the issue. Therefore, I decided the replace all the capacitors of the power supply board. I ordered it from Farnell UK and it arrived at my home in a bag like the following:
So I started de-soldering the old ones and replacing them with new ones:
Here are the old de-soldered capacitors:
Now you see the new capacitors on the top side of the board:
So after replacing all the capacitors on the board, I put everything together and started the TV. Guess what, the TV had no flicker what so ever. I probably extended the TV’s life for another 10 years at a cost of £25 for the capacitors :).
