Originally posted by btek
I did and no luck from it
Hmm seems to me you've forgotten to QA flag/Toggle.
...So yeah 1st download Rebug's toggle_qa.pkg
You must login or register to view this content. or direct mirror from here ->
You must login or register to view this content. . It'll only work/run on 3.55 or 3.41 firmwares (so ye make sure you're on 3.55 kmeaw or rebug's 3.55.4 downgrader or rogero's 3.55, you're choice, but ye a 3.55 CFW) and from your USB stick, install & run/X Toggle QA appbrew, and it'll do it's job & dehash your PS3 successfully if after you heard the beep beep sound. (if you don't hear it, try/run it again)
And after that, install you next choice of firmware (that's CEX) via recovery mode.