CFW Not working for FATs?

[SketchPCIS]

Ok, I've tried several times, from 3.52 M33-4, 3.71 M33-2, and 3.80 M33-5 to update to the newest 3.90 M33 and M33-3.


Each and every time I do, I get an error at 92% that says it cannot go further, and end up with a bricked PSP (Yes, it's a FAT). I've been using the 3.90 firmware from http://www.psp-hacks.com/category/64 and the Updater both from Dark Alex's website, and the self downloading one with 3.80.

I've reset the PSP using the UPMS and Pandora battery created from this guide http://forums.afterdawn.com/thread_view.cfm/580254


...So is this a common issue? What am I doing wrong?


EDIT: I've done it on my SLIM, and it worked without a flaw.
EDIT2: Also, I've used both the offical Sony Brand 1GB Stick that came with the PSP, and a SanDisk 4gb stick that I bought from Best Buy. I've used both for previous updates in the past with no issues (And used the 4gb one to update the SLIM)

[M Dash]

The CFW works OK on my phat and slim PSP, so that a problem in your PSP.

Maybe something related to the NAND?...

[MicroNut]

I had a FAT PSP that wouldn't manually upgrade past 3.71 without bricking.
Have you tried Despertar del Cementerio 4 or 5?
When DC4 came out I used Pandora and it finally flashed properly.
DC4 seems to fix a lot of NAND flash problems.

[No_one_in_particular]

I can't really help, but it's definitely not a common issue - it's down to your PSP specifically.