[Atrix 4G General] dynamiclynk:
TRY AT YOUR OWN RISK! NOT RESPONSIBLE FOR FAILURE ;)​

--> This is just a simple guide\instructions as to what I encountered by taking the 4.5.141 OTA and trying to SBF back to 4.5.95 and how I recovered from the Failed to boot "1" message on the device. <--

My Atrix 4G was a stock rooted 4.5.95 device.

Boot-loader was still locked. I took the 4.5.141 OTA it installed with no problems.

Taking the OTA

4.5.141

killed root of course.

So without reading further and following my DROIDX instincts I thought I could just flash back SBF FULL via RSD down to 4.5.91 re-root and unlock boot loader so I could flash a custom ROM like CM7 on the device so I didn't have to worry with OTA's any longer.

I encountered EPIC FAIL! .

When I flashed the 4.5.95 SBF FULL via RSD it was at 99% writing to the device the device rebooted to install the next code block, but instead the device show Failed to boot 1.

My first instincts were I bricked the device, but I still had fastboot and RSD access. So after reading many places on the interwebs including XDA. I found that I could flash the 4.5.141 FULL SBF via RSD and I would be good to go.

That's when the real fun begin. My battery hit the low percentage mark while I was researching and the device displayed battery to low to flash!!

Now what to do, after reading I either would need to find a way to charge my battery since you can't charge it in the state the phone is in currently, or buy an active 5 pin micro USB cable.

Instead I found instructions on how to create an active USB cable took a little bit to remove the glu from the PCB that the USB wires were soldered to. Basically I just placed a jumper wired from RED PIN 1 to the empty PIN on the PCB viola an active USB cable for FREE. Instead of paying $30 bucks.

My Active micro-usb cable end

SAVE YOUR SELF TROUBLE -- CHARGE YOUR BATTERY! BEFORE HAND! =P

Steps I performed to fix [failed to boot 1 after flash SBF 4.5.91 onto 4.5.141 OTA]

Did a search on google for the 4.5.141 SBF FULL it's about 437 MB

Powered the device off

Make sure you have the MotoHelper drivers installed I was using version MotoHelper_2.0.49_Driver_5.0.0.exe

Insert the USB cable into the Atrix 4G and into your computer if not already done so.

Power on the Atrix 4G if it doesn't power on when you insert the USB cable, DON'T press any keys on the device

The device will enter RSD mode, even tho it may still show only "failed to boot 1" on the screen

Open RSD Lite, I used version v5.3.1

RSD will show your device connected after the driver installs, if they are not already installed.

Flash the 4.5.141 FULL SBF you downloaded via RSD Lite

Wait for the device reboot to complete via RSD it should say PASS after it's finished rebooting which will be displayed in the RSD Lite window, but it may not.

After the device boots, you can either #1 re-root your 4.5.141 device all your data should still be there or #2 Unlock the device using the AT&T [PUDDING AT&T unlock SBF] to allow for custom ROMS like CM7

Note if you decide to go #2 route. Then do #2 first to unlock the boot-loader first NOTE: You will lose your data so backup what you want prior to flashing the PUDDING SBF.

If you don't plan on unlocking your boot-loader just skip to #1 below.

#1 rooting steps

This is the steps I used to re-root

http://www.android-advice.com/2012/root-the-motorola-atrix-4g-running-4-5-141/

#2 Unlock the device using the AT&T [PUDDING AT&T unlock SBF]

Afterwards you can flash a custom recovery with Rom Manager. And flash your custom ROM at your hearts contents. I went with Neutrino ROM V2.5 insanely clean and fast!

I hope someone finds this useful, this is the steps I performed to fix what I encountered, that's all :)

Thanks to all the devs that made the resources and tools available to assist in allowing me to bring my Atrix back from the dead :)