H!!! I have just bought from china SINVIGO R75 Andrid 4.0.3 tablet with Allwinner A13. I used it for one day and then it has gone into boot logo. When I switch it on I get a small android logo, and after few seconds I get bigger Android figure in air then the word Android comes with light flashing through. This will go on and on. I am not very good with tablets and I wish somebody would help me. I have tried holding the volume button down when switching it on. Thanks