How do I get my droid razr maxx HD out of boot loop ?

[AC Question]

Droid RAZR MAXX HD, System version 182.46.15.XT926.Verizon.en.US, Android KitKat 4.4.2. Unrooted, Locked. Last week it started acting slow, turning itself off and on, and changing the wallpaper back to stock on its own. Then stopped fully booting and is stuck on the never-ending Red-robot-eye-of-Sauron. No longer under warranty, already taken to repair shops that were of no help. Already accessed Boot Mode Selection Menu and tried Recovery and Factory resets with no luck. I am able to access Fastboot and connect to my Mac Desktop through terminal with ADT installed, but have no clue what to do from there. Is there a way to get this phone to work again?