Optio 330GS major problem

Ive got a Pentax Optio 330GS which Ive never had any problems with but somethings happened. The battery died whilst it was connected to my pc through the usb cable (I thought the usb powered it but obviously not ). I disconnected it from my pc and put some new batteries in. Now when I switch it on the lens comes out and it makes a really dodgy kindve screeching noise. The pentax logo comes on the screen but nothing else, no buttons work including the power button.
The only way I can get the lens back in is by taking out the batteries, connecting it to the pc, switching it on and then removing it again using the software, this is obviously not good but I cant leave it on all the time.
If anyone has any ideas about what to do, has had similar problems or knows of another forum/site that might help Id be very grateful.

Same thing happened to my 330RS... Couldn't find anything useful on the net, just got it fixed. It was free under warranty, but apparently it's cheap as this is a firmware not a mechanical problem.