Instructions
Reset the PSP by holding the power button for approximately 10 seconds. This will cause the system to shut off, which is necessary for fixing the problem.
Turn the system back on. If the system is not running normally, continue on to Step 3.
Remove the battery from the back of your PSP. This is located on the back of the PSP and can be accessed by sliding the battery door off.
Leave the battery out for approximately 10 seconds, and then reinsert it into the PSP.
Close the battery door and restart the system once again.