I have finally had a resolve, i am not sure where everyone lives but in the UK we are protected up to 6 years under the Sale of Goods act and a product like a tablet is covered for lasting a reasonable amount of time and satisfactory quality. If anyone else is in the UK please let me know and i will help if i can.
To cut a long story short i called the shop PCWorld and told them the problem and they said it is outside of the 12 month warranty so i stated what i was pursuing under the sale of goods act and it covers you up to 6 years. The tablet 3 1/2 yrs old went in and they had to replace the motherboard and it is all working now and no charge!!! As we are covered under the Sale of Goods act. I have claimed a number of faulty goods back this way over the years.
good luck everyone!