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Honestly, downgrading the firmware is tedious compared to upgrading it. I would suggest you have someone who has the technical knowledge to do this. Failed downgrade could lead to a bricked psp. Which will render it useless. Some can be reflashed and will work back while some cannot.
However, you can purchase a Pandora battery for you PSP. Remember: You CANNOT downgrade your PSP with any firmware higher than 3.50 without a Pandora's Battery. You may check this link for a self-help guide in making your own Pandora battery. This is for a PSP slim model. http://forums.maxconsole.net/showthread.php?81424-How-to-create-a-Pandora-Battery-and-Slim-Mem-Stick-WITHOUT-a-Phat-PSP!
Hope that helps!
if your firmware version is 5.03 or below it can be downgraded, if it,s above that it can not be downgraded as on now because the cracks available works only for version 5.03 or below. there are plenty of tutorials in the net if you want to downgrade your psp by yourself or you can bring it to a game shop which offer downgrade/upgrade or modification of psp.
HELLO! There's no need to downgrade ur PSP. If u have upgraded ur PSP from the official site and a official firmware has been installed on to ur PSP, it won't execute games(ISO,CSO) from ur memory stick. It will only run games from the UMD. If u want to run ur games from a memory stick u have to install a CUSTOM FIRMWARE. Try www.psp-hacks.com these guys have many softwares on their site. Dont worry its not that hard to put a Custom firmware onto ur PSP.
hi your previous psp version is 3.80 m33 if yes your using custom firmware that why you can play game to your memory stick the problem is you upgrade your psp firmware to sony official firmware 5.01 you reinstall your firwmware again using custom firmware like 5.00 m33-3 cfw below with m33 or OE
Did yout try using the same UMD game your brother was using and see if the game format has anything to do with it? Since you upgraded, the UMD game may be old, and might not work with Version 3.71. It sounds like your PSP is working just fine other than that.
it's not out yet everyones been looking for one since january sorry man you just have to wait with the rest of us. I last updated my psp in january and got 3.40 and that sucks since i had 3.00 before it. Maybe in a year it'll be released but until then don't upgrade
well, you'll require a modified firmware inorder to play games from your mem stick......now installing a custom firmware or downgrading is a risky process , so do it at your own risk!
once that's done, you'd require a "ripkit" to compress the image incase if it doesn't fit in to the 1 gig stick.....get ripkits for all games from http://forums.maxconsole.net/