make sure that you screws are tight if the are lose they will cause your psp nub to lose connection with the mobo
That's not the problem... I've had lots of trouble with my nub (Ex. Moving slowly or not moving at all, moving without pushing anything, etc.), so I've kinda become a somewhat expert on it. Take the faceplate off and remove the analog. Then take the metal part off the bottom of the analog and take the board off. Be careful with the rest of it because it's a major headache trying to put it back together. Then take a
clean pencial eraser and rub it gentally along the black tracks (lines). This will get rid off the grease/oil from the rest of the analog that sometimes drips down and shorts the contact. Put it back together and test it out. If your still having problems, take it apart again. Once you take the board off, take a small screwdriver or knife and
carefully lift up the little metal tab-like things on the analog (they drag along the tracks of the board). After you lift them up a bit, put everything back together and test it out. More or less, it should work. What happens is that the tabs get pushed down when your thumb presses down on the analog, making the contact weaker. By lifting the tabs up, your strengthing the contact. Now, these aren't always permentent solutions, so you may have to repeat them every once in a while. But at least your able to play your PSP. I hope this helps you with your analog and good luck with your mod.
P.S. Yellow LEDs would look pretty cool with the red crome. Just make sure you add a switch to turn them on and off.