I am trying to upgrade a friends PHAT PSP to CFW 5.00 M33 (from 3.71 M33-2), but the updater gets to 99% and stays stuck there for several minutes. It then drops down to 84% and tries again, but it's an endless loop.
At that point all I can do is remove the battery which bricks the PSP.
I have unbricked this PSP several times and tried to update again and again.
I have also already used this updater on another PHAT and a Slim and both work fine, so I know that's not the problem.
Anyone know what the problem might be?