Title is self-explainatory. I bought my PSP with CFW 3.40 on it. I wanted to upgrade the firmware so I can play some newer games (5.50, to be exact). When simply updating wasn't enough, I found I had to downgrade to an official firmware.
Well, I did this, and successfully downgraded to OFW 1.50. However, when I tried updating to OFW 5.50 (Part of the process of the CFW), it won't allow it. It'll boot the updater, but then gives an error message:
"The system cannot be updated.
The update data is not applicable for this
I heard that I had to update to OFW 2.0 first, but trying to update at all leads to the same result. Can anyone help? I've got a PSP 1000 (Phat)