Updating psp firmware without battery
This is designed to remove custom firmware easily and restore a classic 1.5 firmware back to your psp. Version 1.5 firmware does not work on the 'Slim" or later models and will 'brick' them.
Most people know of the famous pandora battery technique which will unbrick and/or downgrade a psp's firmware. All should not be lost if you have the means to reinstall the custom firmware.
If you just want to run official software and games, though, updating is the best choice.
Sony offers three different ways to update your PSP's firmware, so you can choose the one that works best for your internet connection and equipment.
What I was not aware of is that the pandora technique in not necessary to downgrade from custom firmware psp's. You'll rarely brick the PSP for all eternity, but you'll make it hard for yourself if you don't have a recovery plan.
So in case there are others like me, I thought I would share my knowledge. As for reverting to original Sony firmware on a 'Slim' or later, well for now you'll have to keep looking, like I am ;) OK, if you have a PSP Slim and either wireless network access to the internet or a copy of the current official firmware saved to some storage medium When you check out the system information, if your custom firmware (CFW) is version 3.80 M33 or greater (in my case it was 4.01), then the following edited info from PSPMOD applies.
We encourage you to check this page from time to time for system software updates and to always maintain your system to use the latest version of the system software.The different types of homebrew applications range from text editors to ISO loaders.Due to the latter one, which enables piracy, Sony is strongly against homebrew and does its very best to contain it.There’s a constant battle between the homebrew community and Sony. Last week we posted about various ways to downgrade your firmware.Today we’ll guide you through a method that works for nearly all PSP’s, disregarding the current firmware.