[Motorola Atrix HD] br0adband:
Why would you use Myth tools to flash the ROM if you installed CWM - isn't that the whole purpose for CMW and recovery tools like it in the first place (given the Nandroid backup potential, that is) ?

I honestly don't know hence me asking, but it seems like with step 7 perhaps it should have said:

7) copied ROM zip file to internal storage, rebooted to recovery/CWM and did a full wipe (that means FULL wipe: format cache/data/Dalvik/system, all 4 of them before proceeding), then installed the CM11 ROM + Gapps (I'm guessing)

Least that's how I always do things, the only time I ever flash a ROM from Windows is either a full back-to-stock thing using RSD Lite or whatever tool is necessary for whatever device (I just happen to own an Atrix HD at this moment so it's RSD Lite). Sounds to me like you need to do a full stock ROM recovery (flashed with RSD Lite) and start over again.

You say that you can get to AP Fastboot mode - if that's the case you should be able to flash the CMW image file using fastboot (you need to make sure you're using the Motorola fastboot.exe file, not the "standard" Android fastboot.exe that comes with the Android SDK because it can cause issues).

Get the CWM zip archive, extract it, get the recovery.img file and use:

fastboot flash recovery recovery.img

to flash it to the AHD in AP Fastboot mode - this should get you a working recovery once again (boot using all three keys, Vol Down to Recovery, Vol Up to select it and then go from there when recovery loads). This assumes, of course, that fastboot is going to work - before attempting to flash try using:

fastboot devices

and see if it lists the device at all - if it's not seeing it, you're kinda stuck for a solution (that I can't offer, sadly). If it does then flash the recovery.img manually and then disconnect the USB and power it down by holding the Power button for at least 15 seconds; if the Power button doesn't do anything, hold all 3 buttons for up to a full minute and hopefully it'll die. Mine did that last night at one point: it was stuck on the Motorola logo and nothing worked, so I held all 3 buttons for about 55 seconds and it finally 'died' so I could do a proper boot into recovery.

I'm guessing that since you used Myth Tools to flash the ROM it's not actually sitting on the internal storage so... you're going to need to get a microSD card and put the ROM zip archive on the card along with Gapps or whatever if needed and use recovery to install it from sdcard1.

Hopefully this'll get you up and running again. I just got this Atrix HD of mine yesterday and did the following last night:

- contacted AT&T to get the carrier unlock code (all automated through the website, got the email containing the code early this morning and used it earlier, now working fine with T-Mobile and LTE is working as expected)

- rooted using motochopper

- unlocked bootloader with motopocalypse

- installed CWM 6.0.4.4 recovery.img by using fastboot to flash it directly

- copied the CM11 ROM zip archive to the microSD card (while attached to the PC since it was still stock ROM at that point and MTP was working fine) + Gapps

- disconnected the AHD from the PC and shut it down

- rebooted with 3 buttons to CWM recovery

- full wipe (did factory reset, then cache, then Dalvik, then system)

- install CM11

- install Gapps

- reboot

No issues encountered in the process but I rarely do have problems, maybe I'm lucky, who knows... :D

ps

Just for the record, I use the official CM11 nightly builds, the one I installed last night was cm-11-20150216-NIGHTLY-moto_msm8960_jbbl.zip - not sure if that will or would matter (I'm guessing not) but I figured I'd mention it, and I used gapps-kk-20140606-signed.zip for Gapps.