Is the wifi switch broken on your good psp that you need to use it from the broken mobo? If your good psp still has a good wifi switch, you can still use the wifi switch to operate the leds on your good psp. Looking at the wifi switch, you will see three prongs solder to the mobo. You would have to bridge the two closest prongs together and the third one, is where you'll be connecting the (-) wire to the led, on and off function.