[Q] Kindle fire 7 (4th Gen) BootLoop / power button issue topic

Hi, I could use any help or advice you guys might have to offer, the problem (at first) seemed to be just a bootloop - I am able to get the device to boot by connecting the device to the computer then disconnecting and reconnecting the kindle battery ( usually works 1 in 7 times ) .. I have tried a factory reset through the device menu which completes without issues but once the power button is pressed (tapped or held) the device freezes and then starts the bootloop again. I have been able to use adb to get the device into the recovery menu but trying to recover this way starts the boot loop again, possibly because the power button has to be pressed to confirm the option.
edit: forgot to mention that when the power button is tapped it asks if I want to power off - it doesn't just turn the screen off (I'm not sure if this is normal or not)

I'm unsure what to do at this stage, so any advice would be gratefully welcome.

helpful info:
kindle fire hd 7 (4th gen)
fire os: 4.5.2