have you tried resetting the controller, there's a small pinhole located next to a screw on the underside of the SixAxis, that 's the SixAxis Reset Switch, try plugging the controller directly into the console to see if that powers it up, if so hit that reset switch under the SixAxis, hold it for like 10 seconds before releasing it, if that doesn't work check the manual that came with the PS3 for troubleshooting tips, if all else fails you may need to buy a new SixAxis or call Sony Support...