I have an XT912 (Droid Razr Maxx) running (was running ) JB 4.1.2. I rooted it and just updated Safestrap to 3.75 in order to prepare for LineageOS 14.1. Safestrap was running well and I made a good NANDroid.
Here's where I went sideways and what has happened since:
I did the required wipes (paused for a while to do some additional reading) and decided to exit Safestrap in order to reboot and check an app setting. When I started the reboot, TWRP stated that there was no OS installed. I continued to reboot (I momentarily forgot about the wipes) and was shown a message that SU was not installed and was prompted to install SU (I thought that this was odd, but did that action without error) and selected Reboot when it finished.
The Motorola power-up logo displayed for the usual amount of time, but the Safestrap splash screen never appeared. After a 2-3 minutes wait, I pressed/held the Power button and the same sequence happened, again. I did this a couple of more times. After the first two times, I saw a short bar of white flash across the bottom or top of the screen before or after the Motorola logo.
I then tried every button combination (Power/Vol-down, Power/Vol-up, Power/vol-up+down), each time for 10 and, then, 30 seconds. All got either no result or the above Moto logo followed by a blank screen.
I plugged the XT912 into the PC's USB port and got nothing on the screen, but the USB connect sound happened each time that a button press resulted in the Moto logo, both when it appeared and when it disappeared.
I went to bed. The next day, pressing the Power button got nothing, as did any other button combination.
I plugged the phone in to charge (using the PC's USB port) and the power-LED lit. After an hour, I used the Power button and got nothing. I plugged it back into the USB port, saw the charging-LED light and used the Power button (10 7 30 second presses): I got nothing.
Today's status: I get no noticable response from any button combination, but I do see the charging-LED when I connect it to the PC.
The one thing that I haven't done is disconnect/reconnect the battery.
I have seen references to tools that can flash a stock image to a "dead" phone (RSD Lite).
My question is simple:
Is there any way that I can recover/unbrick my XT912, based on the above data?
If additional data will help, let me know.