For myself, I'd ask when this firmware was updated and from what source. What is the current firmware version showing on your unit? No new firmware for the ONE XL has been issued in eons.
Before knowing, I'd recommend turn it on and forcing a reset by pressing (gently, with a paperclip or similar) the reset button in the bottom of the unit until it reboots itself. Then get into a clear sky (outside, unobstructed view) for as much as 10 minutes. See if you can get a satellite lock.