Pls follow the steps below to reflash the A8 tablet:
1. Download the system files to the tablet with your PC (system.img , system.md5, uramdisk.md5, uramdisk.img) from this link: http://www.divshare.com/download/13707297-baf
(Please release the files to the tablet. Pls kindly note when the tablet plugs into your PC, you need to make the choice for using the tablet as a storage device.)
2. Turn OFF your tablet.
3. Hold the menu & home button (which are on the upper side of the tablet and beside the power button), and then turn on the tablet.
(Pls kindly note that you still need to hold on the menu & home buttons when turning on the tablet )
4. Follow these instructions step by step:
5. The tablet will be reflashed automatically. After all the above steos are done, pls press the back button, the tablet will be reboot to the original state. Everything will work fine afterwards.