Originally Posted by DebugBrain
When ps3 power cable is disconnected the NOR takes power from teensy, but also crackmyday method with the short on 3v pad supply the NOR at 5v because there is no voltage regulator installed on teensy
Not really... If you follow the traces, you'll find that the 5v from USB is completely disconnected when the 3.3v traces are connected (and the 5v pad is cut, of course). Not only is there no power from the Teensy++, but the board is supplying the power for both the NOR and Teensy++ in that configuration.