This sounds similar to the problem I experienced in December, discussed in this thread...

http://www.internettablettalk.com/fo...ad.php?t=12607

The thread contains a number of sensible repair strategies which did not work for me, but which might be useful to others. In this message I explain how I fixed my Internal "card"...

http://www.internettablettalk.com/fo...1&postcount=24

...using this command...

sfdisk --no-reread /dev/mmcblk0

...but be aware that the contents of the card are lost in the process.