Hi,
I too, had this issue.
I had decreased the Backlight to 10 seconds and holding the lock button caused the unit to reset.
So I requested an exchange (through Amazon).
The new unit did the same thing, but only after I had made that timeout change.
Changing the Backlight back to 15 seconds does not cause the reset.
I am going to cancel my return and keep both 'cause I like this little player so much.
Firmware is V01.02.18A
