For those of you who want to unbrick/unroot your Droid Bionic completely back to stock, you can use the unroot method here if you have a “stock” rooted ROM.
If you don’t and you forgot to make a CWM backup of your stock rooted ROM, here’s how to completely restore your Droid Bionic using RSDLite. This method is only for Windows.
Step 1. Turn off your Droid Bionic, then boot into fastboot mode by holding down Volume Down and Power button together for about 3 seconds and let go of both buttons.
Step 2. You should have enough battery life to do this, if you see “Battery OK” on the screen you are good to go.
Step 3. Download unrooting files and unzip.
Run RSDLite5.5.msi to install RSDLite(1), you should get an RSDLite icon(2) once its installed.
Step 4. Run the RSDLite program and you should get some kind of USB connection shown like below. If you don’t, you need to install the Droid Bionic drivers. (Download Droid Bionic drivers here.)
Step 5. Click on the icon by filename and find bionic_minimal_fxz.tar.gz where you unzipped the files.
Step 6. Choose “Uncompress Only”.
Step 7. Hit “Start” to begin unrooting process.
Step 8. After about 5-10 minutes, your Droid Bionic will reboot and be unrooted back to Android 2.3.4 stock ROM.
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You will need a rooted Droid Bionic to install all ROM/kernels.
How to Root Droid Bionic!