I soldered a blue led into my original NES now it won't turn on. When I push the power button the light will do a single flash for a split second but nothing else. I'm beside myself because everything was working fine before I soldered the LED on. I know it's not the AV adapter because I have three NES and all the other ones work with the same AV adapter. The solder points aren't shorting out on each other either there is no continuity between them. I soldered blue LEDs into my other two NES's and they work great. Any ideas?