Helix Floor Firmware Update Failure Fix
Boot Failure, entered update mode
Attempted Firmware update 3.70 to 3.71 using Helix Edit.
Ended up stuck in Boot Failure, entered update mode.
Forget about using reset methods - they won't work!
Fix-
1. Make sure your Computer sleep mode is off! Laptop- make sure you're plugged into power or have a full battery. You don't want anything to interrupt the update!
2. Close out of Helix Edit and Power off Helix.
3. Download the latest version of Line 6 Updater from their site.
4. Open Updater and Power Helix back on.
5. Updater should recognize your Helix! (yay)
6. Update Helix from Updater.
7. Breathe a sigh of relief....
These steps worked for me, I hope they work for you! The Line 6 Updater download is right on the main Downloads page.