My iPad was at the latest iOS 7.x when I decided to update it to 8.0.2 via iTunes. At the end of the update I got an error, 6 IIRC. After that the iPad was stuck in restore mode for around half an hour. When it got out of restore mode somehow (without doing a restore) it wouldn't boot up. It gets as far as the Apple logo then dies after a few seconds. It does the same thing whether plugging into a laptop or a wall charger.
To make things worse the sleep/wake button is stuck.
How can I unbrick this thing?
Edit: I've found that by pressing the home button while plugging into the laptop, I can put it in restore mode again. But restoring is a last resort.