Display touch not working
I changed out the display. The unit will power up but does not respond to touch.
The Kindle Fire HD 8.9” is a tablet computer that allows users to read books, view comics, watch movies and find general entertainment at a mid-range price. Fixes are simple and do not require any special tools.
You probably have a faulty digitizer. Power off the device recheck the connections and clear of any debris with canned air, just in case. If the digitizer still isn't responding, you need to get a new screen.
If this was a part purchased from iFixit I'd suggest contacting email@example.com