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QA flag requires certain firmware and a special .pkg and then a button combo. what CECH.... CECHA, CECHB, etc this is to help determine what firmware is safe to downgrade to. I would downgrade to 2.20 then back to 3.21 then 3.41 or 3.55
Last edited by Thelostdeathknight; 09-29-2011 at 08:37 PM.
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