R0. After watching video and pressing return the player freezes?

[Olphus]

The R0 goes to backlight and stays like that when I press the back/return button after watching video
This doesn't happen when I play music, only in video.
The only way for me then is to hold down the on/off button to turn it off.
When I press the on button it goes into System Checking, but at least it works and I can continue using it...but as soon as I watch video the same thing happens.

I'm in MOD 2.30 BTW.