Here's what a user managed to do to fix it:
figured out how to get around all those lock ups and bricks that plague the Ally! If you are stuck in a loop and can't get to a recovery screen this is what you do.
1. Take out the battery.
2. Take out the SD Card.
3. Hold down the Up/Down Volume, Home, and Power button for 10 seconds.
4. Leaving out the battery and SD Card still plug in the charger cable and turn it on normally by pressing the power button. It should cycle and viola! You are back in business!
You can only remove the SD card, but see if it works.
You can try a factory reset from the privacy settings. Maybe after that you can get into boot loader.
P.S. Might also want tot try this: https://www.google.com/search?btnG=1...very+safe+mode
You shouldn't give up. Clearly there must be a button combination similar to those I described. Also make sure the buttons work (test in booted android) and that you are firm when pressing them. Being a new device you gotta press harder on them.