Sounds like your BIOS or Mainboard has some problems me thinks.
If there are any back panels on your laptop where you can do expansion stuff, open them up and see if there are any BIOS batteries where you might be able to clear the CMOS or something, I work with ASUS Notebooks and thats helped a few times in the past.
How much warranty do you have left on it? You could take it back and ask them for a repair or something.
Otherwise if its out, you can be a freak like me and fix your own Sony notebook lol. Mine had a faulty CPU fan
<a href="http://www.flashyflashy.net" target="_blank">flashyflashy.net</a>