Thanks both.
Bizarrely, for some reason, it just started working again this morning. More out of hope than expectation, I tried to turn it on and it just started up as normal. The only odd thing about it was that it seemed to have 'forgotten' about the last 200 pages worth of reading I'd done, i.e. it opened my current book at page 9 when I know I was up to page 200 and something. The history didn't show anything beyond page 9 either.
I hope this isn't an indication that it's starting to go terminally wrong, but, if it is, at least it gives me the perfect excuse to buy a new reader
