Introduction
Tools
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            That's my PSP. As you can see, the UMD door it's broken. It fell down when I was playing. 
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            That's the part where the screws are located. You must move away the battery before doing nothing. 
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            We must unscrew the screws marked with colour blue. 
 
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            After unscrew the screws we can move away the front case. 
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            This is the button board. In my case it's damaged. 
 
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            This is one of the two clips which the button board has. With an oppener tool you should release it. 
 
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            Lift the latch open, away from the ribbon cable. 
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            Pull the cable away from the latch, and we are done! Be careful with the latch because it brakes easily! 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.