My friend’s PSP is not working no more. The “R” trigger button seems always be pressed by an invisible force;) .

The syndrom is that he can start a game, but cannot quit a game by pressing Home button. Once the back to home screen is shown, there’s no response by press any button except the home key itself.

Also in MHP2 (Monster Hunter Portable 2) , the hunter is always running. (appears just like when R button is pressed)

We think it’s because the PSP is busy responding to the pressed R button.

Thus, the immediate solution I had was to take apart the psp and do so some inspection and cleaning.

It’s not difficult to open the cover at all, there are 4 screws inside the battery compartment, 2 on the back of the psp located the other side. and another one on the side opposite to the UMD door.

Open the front cover was easy too. Same as the plastic right trigger.