Thanks for the help. Couldn't see spending $50 - $100 to unlock a head unit I bought for $35 on eBay. I unsoldered the power pin to the EEPROM. This unlocked the unit but it would flash every few seconds (as if it were losing power). So, I went ahead and just removed the whole chip. It works fine but, aside from the time, doesn't remember anything (radio presets, manual equalizer settings, CD track and time).