[FS#840] AR71xx - Recent firmware won't flash (building without errors)

[LEDE Bugs]

The following task has a new comment added:

FS#840 - AR71xx - Recent firmware won't flash (building without errors)
User who did this - juanriccio (juanriccio)

----------
I've been trying to flash a new firmware several times now. Several versions, all built without errors. The router won't even reboot after I flas via LuCi. Something must be amiss. How can I reset the router without bricking it, so I can try flashing from scratch?
----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=840#comment3481