I'm sorry about the issue. Can you please press and hold the Power on / off button on the Kindle Fire HD tablet for about 45 seconds, then turn it back on and check.
Is there any power / light?
Please reply at the box below. Thank you.
Can you charge the kindle for a bit, then while charging it, press and hold hard on the power on / off button for about 60 seconds this time, then turn it back on and check. Is there any power / light on the kindle at all?
Was the tablet dropped? Can you try my last suggestion, and see what happens? Please let me know. Thank you.