Reset Kindle Fire HD 7

I have a Kindle Fire HD 7 (X43Z60).  I need to factory reset the device.
Just so no one thinks anything odd is going on here; I do side work for a pawn shop, cleaning off laptop, tablet, etc... that people have sold. I tell them repeatedly to make sure and get the password before they buy it, but they don't always do that.  

So, I can turn the device on and use a few applications, but when I go to settings, there is a "Draw Pattern Lock."
After 3 attempts, it ask a "Security Question."  "first dog name."  I can try this 10 times or 100 times and it never does anything else.

All I want to do is reset this device so they can sell it.  Any ideas?
paulfarmerIT DirectoryAsked:
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Jackie ManIT ManagerCommented:
You can try to do a factory reset by connecting it to a computer and ADB commands.

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paulfarmerIT DirectoryAuthor Commented:
Jackie Man solution clearly would have worked.  However, there ended up being a slight time delay from when the device came on to when the password screen was activated.  About 3 seconds.  I was able to go in and press factory reset in those few seconds, after about 20 tries.
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