I do think you are all wrong.... This downgrader should woek for PSP Mobo's from TA-079 to TA-086 (including also the infamous TA-082)
Did he check that he had the correct dump with all the necessary files before downgrading? Probably no, so this is another of those cases of not making sure 4 times (or better even 5) prior to do something that can be critical for your PSP...
Plus I am sure that an easy downgrader pack will come out soon, so people unsure of having everything necessary should wait for it.
Anyway, sorry for your loss... It's always sad to hear that a PSP has bricked.
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