my haipad 701 is bringing up a message that the nand is damaged ,suggesting that a format might cure the problem. i have tried this but it did not work. Any suggestions please. the nand is 4GB with 512 of memory. It boots up all right but I have lost all my music, photos,movies etc. Kindle works but i had to redownload all my books. Icannot mount the NAND or my sd card.