Answer 1

Hi. This can be owing to corrupt cache. I will provide you with a link with the procedure you are to follow to try a clear the cache partition now now.

Edit: Follow the steps here http://satechhelp.co.za/1214/Hard-Reset-Vodafone-Smart-Tab-3g with one exception. On Step 5. choose 'Wipe cache partition' instead of 'Wipe data/factory' reset. When the cache wiping is completed, reboot the tablet according to Step 8. Let us know should the 'No Sound' condition persist and we will help troubleshoot it further.

Comments

Hello - Have you tried a hard reset? If a hard reset did not work then you must take it back to the shop you bought it for service/exchange.

Hard reset instructions: Settings==>Backup & reset==> check backup and restore==> Touch factory data reset and follow the instructions.