No Sound on TV - Picture OK
This is not a very common fault on modern TVs - it's usually no picture.
The main cause is likely to be the audio amplifier on the main board has blown which will no doubt be in the form of a single integrated circuit. It may be possible to replace the chip, but may be even more cost effective to replace the main board if there are many about. You are looking around £60-£80 to fix.
Speakers
I have had speakers go open circuit which obviously will give no sound. There will be two for stereo, but they will not go at the same time. One will go first, but will not be noticed by the owner. The owner will turn up the volume to compensate for the lower sound which will put a strain on the remaining speaker until that dies.
Things You Can Try
If there is a headphone socket, try plugging in headphones to see if you can hear the TV sound. If you can, it may be possible to use an external amplifier by connecting from the headphone socket to the amp.
Better still, if you have a sound bar, or you can 'borrow' one off someone who doesn't use theirs, you can use that for the TV sound. The TV will most likely have a optical link socket where you can connect with the sound bar. You may have to activate this in the audio/sound section of the TV menu.
Actually, it would be a good idea to check the audio section of the TV menu to see if the TV speakers have not been disabled. A lot of TVs have this function, either for just using headphones, or using something like a sound bar. No sound could be something as simple as a setting in the menu.
Buy a Sound Bar
If you can only hear sound through the headphone socket and you've tried everything else, it may be cheaper to buy a sound bar rather than getting the TV repaired. Make sure you have audio coming out - you don't want to fork out for a sound bar only to find it doesn't work!
A Reset
Sometimes resetting the TV can restore the sound. Quite a lot of older TVs had this problem, but worth a try on any TV, even for other faults. Search through the menu for 'factory reset' or 'first time installation, etc. You may even find it in the ' Tuning Menu'. Don't worry if it tells you all programmes and settings will be lost, it just means that when it comes back on again, it will be as when it was first switched on after being bought from new. Obviously, you will have to tune it in again if you are using a aerial, and wi-fi will have to be set up again if it's a smart TV. You have nothing to lose, and it may bring your sound back!
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