>>19 公式マニュアル Factory Service Mode Factory Service Mode is used to perform operations like downgrade. To enter factory service mode using Cobra, follow these instructions. 1. Power off your PS3. 2. Insert Cobra USB in the PS3. Make sure that it is in factory service mode (switch in right position). 3. Turn on PS3 and press eject quickly. 4. Blue and green led’s of Cobra will flash while booting, green led will be the final led on success. If you are on a regular ofw or cfw, the console will shut down. If you are on cobra CFW, the console will continue booting normally (unless it is semibricked, in that case it will stay on forever). In both cases, don’t worry, despite that, the PS3 flag that sets factory service mode will あとここにはE3 flasherでFSMに入るためにcobra usbを使用したことも書かれてる http://www.ps3hax.net/showthread.php?t=30278