I’ve got several emails from users asking how to hard reset Kindle. For some reason Googling for it does little good. So I might just as well do a post on this topic for those who are too lazy to read the manual or don’t have it handy (possibly because their Kindle that has it in a form or e-book froze).
Kindle 2 or Kindle 3 reset: This is easy – just hold the power button (next to the headphone jack) for 15 seconds and the device will reboot.
Kindle DX reset: Same as Kindle 2 – hold the power button (next to the headphone jack) for 15 seconds and the device will restart.
Kindle 1 reset: This is a bit more tricky since you’ll need a paper clip or something similar (it was reported that ear-rings work quite well). First remove Kindle back cover by pressing on it firmly while sliding the cover to the right with your thumbs. Then find the reset button above the battery compartment as shown on the picture and press it with the paperclip. After several minutes your kindle should be rebooted.