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If you have been wondering why you cannot connect your psp as usb type b I might have your solution here. If you have downgraded your psp using older downgraders and not the pandora method you most likely have corrupted keys. The keys became all scrambled on TA-82/86 motherboards back when these downgraders first came about. As ingenious as this method was it ended up leaving things a little unfinished. Some of these keys are responsible for correctly recognizing your device as a psp when you hook it up to your computer. I struggled for quite a long time to find a reasonable solution but it seems that most people don’t care. If you googled this you might have thought this was a vista issuse but it is not. Allow me try and assist you the best way that I can. This will not work on slim

What you will need
1. Some knowledge of hexediting because if you mess up things could go potentially wrong on so many levels.

2. XVI32 Hexeditor here is a free one

3. Keycleaner 1.4 this will be installed on your psp

4. IDstoragemanager 1.3 this will be installed on your psp

**Disclaimer I am not responsible for any mistakes or damage done to you psp please follow carefully** Ok lets begin. Place Keycleaner where you normally place homebrew on your psp and run it. You will be asked what type of motherboard your psp has. It shows you how to recognize the different types. As a precaution dump your keys first then analyze and verify next. Make sure you have the keys dumped. Verify the keys and allow it to fix what it can. It will most likely not be able to fix 0×0041 and this is the file that will need to be replaced/edited.

Now lets hook up the psp and checked where you dumped your keys. It will be in a key folder on your keycleaner folder. Lets take the 0×0041.bin file and place it on your computer for hexediting. Open up your hex editor and open this file in it. Now you have to match these values exactly or this will not work. Also there is alot of room for errors maybe you can have a friend help you read them off.

Once you have made sure you entered all values perfectly save your file. Now place idstorage manager on your psp where you normally add homebrew. Also make a folder called keys and place your new 0×0041.bin inside. Run idstorage manager and have it verify keys it will notice it does not match your original and ask you to flash it by pressing x. You can go ahead and do so.

Now run keycleaner one more time just to test and see if it gives you anymore errors. You should be golden about now.

If hexediting is not your thing. ask to borrow a friends psp whom psp you know has good keys and use keycleaner to dump that persons keys, take them off that psp and put them on your psp with idstoragemanager. Alot simpler this way but i didnt know anyone who could lend me their psp so I was out of luck. Please leave questions in comments. If it were legal I would just post the bin file for download. But please be cautious flashing keys from another PSP could render your PSP useless or partially functional. Only flash certain files such as key 41 and 43 because the are universal. If you were you flash files that are specific for one PSP on another you will cause irreversible damage. Keycleaner will only fix certain keys and not keys which are independent to that PSP.