Switch off.
Press and hold the start/pause and skip/reset buttons together.
While holding them, switch on.
The leds will flash, let go of the buttons and the leds will scroll.
If the leds are scrolling
Press and release the fabric button repeatedly until you get the 2nd bottom led of the 2nd column lit.
You will now see an error code, let me know the code.
Now switch off, switch on and switch off again.
CK
June 2012