Please help me! - Fire Phone Hard Brick

Hi. My Fire phone won't boot. (I bought 2 month ago ~ 170$ ) :crying:
Because, I am using latest ver 4.6.4
I ROOTED , I install Safestrap v4.0.1
I Downgrade 4.6.4 to 3.5 using Safetrap recovery.
Now my Fire phone hard brick ( Still black screen, No recovery, no fastboot, won't charge )
I plug in PC, detected Qualcomm HS-USB QDLoader 9008
HOW TO FIX ??
I NEED FULL DUMP FROM OTHER FIRE PHONE !

Thanks !! :good::good: