I have a 32" LED TV and a year ago I lost visual (picture) while the sound was still working. Repairs costed R1400.00 and the same thing has happened again. Why does this happen and what can I do?
Power issues are the most common cause of solid state electronics failures.
So, not so ironically it sounds like a poor power issue. Normally this isn't a problem in most places, and varies with quality and such; but, power brown outs and/or power outages wreak havoc on solid state systems. Audio is less complicated of an encoding and timing, so it appears that everything is working in the set, up to the decoders, this means, it's getting the signal, and it's processing the signal and sending the information to the right parts of the machine; but, when it comes to turning that information into a picture, or audio, the picture part is not getting decoded.
To do this requires great sensitivity in timing as a part of translation. Audio is not as critical as it's basically a single signal, whereas the video is made of colors, intensity, and knowing where the edges are in the code which requires timing as there's little time to buffer the image.
Or it's something as simple as the power supply to drive the lighting, and just shoddy quality that can be protected with a surge protector.
And so, basically, all this is probably handled on a single board or a power supply separate from the audio that drives the LCD lighting, and that could include the programming to decipher the signal and the clocks for the timing which would be high frequency, and it's possible the clocks that get damaged during brownouts and storms, or the power supply getting wonky from the power source and killing the electronics that drive the video.
Since you didn't name a brand; I'd suggest you not use that brand and see if you still have issues, and make sure it's surge protected.
At some point, usually 50% of the cost of a new device, it's not worth repairing; and if it's the second time, I'd include that as part of the math in figuring out if I wanted to do it again. If you don't get that many brown outs, or power outages, then it's just shoddy material; but, I keep all my sensitive electronic equipment connected to surge protectors, and some really sensitive stuff connect with battery backups with surge protection.
If you do have a surge protector, and it has a warranty, and you have your receipt, you may be covered by them for repairs; but, you'd need the warranty. Some are limited, some are for lifetime. But, either way, Power issues are the most common cause of solid state electronics failures.
Jul 04, 2017 |
Televison & Video