Okay - this is a bit strange that several of us have experienced very similar, if not the same, problems in recent days.



Danger Will Robinson!
For me it was 3 days ago - had been listening for about 1/2 hour or so in Mango Mode with battery about 60% and it just shut off out of nowhere on a track I have listened to dozens of times over the last few years so I didn't suspect a corrupt file, etc. Tried to power back on several times and it would cycle to the starting screen then say Goodbye and off to lala land. Case was only mildly warm at the top panel. Removed the memory card and tried again - same result.
After trying the Play + Power combo I was able to get to the recovery screen and performed a power off. On restarting it came up successfully in Android Mode but would not boot to Mango. Then tried a factory reset and wipe all data and same results - Android worked but not Mango Mode. Decided I would reload the FW the following day.
Next morning it booted into Mango Mode without issue - heading scratching

what the heck - wasn't like it was overheated or low on power, etc... Downloaded 1.17 FW to internal memory (the version I was already on) and performed a local FW update and so far so good - no issues.
Hope it doesn't become a recurring problem...
Cheers,
Tim