The 10NES authentication chip was completely removed from the system in an effort to eliminate the blinking red power light problem associated with it in the original NES. The removal of the 10NES chip also allows the system to play games that are unlicensed and/or from different regions such as Europe, something NES-001 systems cannot do without a hardware modification. A minor side-effect is that Nintendo World Championship will not work properly since it needs to know when the console is reset in order to go back to the menu. This signal is only provided by a working 10NES on official hardware.