03-12-2015, 01:26 PM
Did you go to "Settings > Format > Restore PS Vita system"?
Usually that would be able to link a new PSN account to it. Also do you have a memory card? The PSN account is linked to the memory card. If you also bought a used PS Vita memory card then try formatting the memory card as well.
Usually that would be able to link a new PSN account to it. Also do you have a memory card? The PSN account is linked to the memory card. If you also bought a used PS Vita memory card then try formatting the memory card as well.