Kindle 3 bricked - Kubrick no use - any ideas?

Hi all,

My Kindle 3 is frozen on the boot page ("amazonkindle" across the top, silhouette of tree and reader, and progress bar stuck at about 15%).

I've removed the back and checked the battery voltage: 3.7v.

Plugging the device into a wall charger lights the yellow charging light for around 15 seconds, then it extinguishes.

Sliding the power switch does nothing.

Sometimes the light turns green for a few seconds, then it goes off. with random power-cycling it can be made to start booting, but it stops again on that same page as above.

Kubrick can't see the device, as the 30 second power, then volume down sequence does nothing.

Any ideas?

Thanks,

Adam