Unit powers up, goes through 'booting firmware', opens the main menu and then won't proceed any further. If you are quick you can select the next level menu and scroll a bit but then it seems to run out of brain, locks up and requires a 10 second shutdown procedure (see below).
I have switched it off and back on a many times, only to freeze up every time.
The unit appears fully charged (according to battery icon) after a long time connected through the desktop computer (it's switched on).
I thought if I could get to the Firmware update option and re-install, I might have half a chance of fixing the problem but I can't get to that point.
The unit has never been dropped or damaged in any way but has had a lot of use over 13 months. I have recorded 400GB of data, the majority of it is in MP3 format at a sample rate of 44.1KHz & 96 bit rate in mono.
Before this happened, it had one of those " hard to power off " turns after a long charge at the computer. My solution was to just hold the ON/OFF button down for about 10 seconds. I have since read that the correct method is to hold the ON/OFF and delete button down simultaneously for 10 seconds.
I am wondering if the impasse (menu freeze) is a sympton of internal battery fatigue or does this mean something's seriously wrong.