Hi, this Drummer I was working on froze after few seconds or minutes of browsing through presets and functions. It could be similar issue and it's worth trying. Item was "
TS80C31X2-MIA IC MCU 8 BIT Romless 40 Pin Dip Atmel" by UK seller
http://www.ebay.co.uk/usr/blueskycomponents
_trksid=p2047675.l2559