How to Downgrade PSP

You must have a pandora battery in order to downgrade your PSP firmware.

• Reformat your memory stick.
• Take out your PSP Memory Stick and pandora battery, then put back in your PSP Memory Stick first, and put your battery back in.
• Turn your PSP power on, when you see three options; select the Downgrade option, your PSP will be downgraded in a very short time and it will be automatically shut down afterwards.
• Turn your PSP on again, and you will see a blue screen. But no worries, you can just press the O key, and your PSP system is already version 1.5!