Corrupted Desk on tablet S

[Teatimeoclock]

Hello,

I've been working flawlessly with my tablet S for a long time. Two days ago, I switched on the tablet and the main desk-board began flashing and I didn't present any icon.

I can run some applications using and indirect way (I can access "Preferences" from the pop-up menu on the right-down corner of the main screen), but when I come back to the "Home" board view it keeps on flashing.

I've try a reset (nothing happens). I took out the external SD-card and the phone card: same behaviour.

I'm thinking of doing a total reset  (back to factory conditions) but that would be the last chance (many applications and data to back-up, if possible).

Does anybody know what's going on here with my table or could shed some light into this nasty problem.

Thank you very much.