I had the same problem i guess, i upgraded to cfw 4.21 v1.0, then i used downgrader to return to 3.55, i didn't return i was stucked on 4.21 and when i want to install the 3.55 it says that i have to install 4.40 or later... i tried twice but same, after that i relaunched that QA and tried combination, i successed to return it back to 3.55... after that i tried the 3rd time so i luckily installed it...
i guess maybe it is the QA problem coz the 1st time i launched it, i failed to make the test with the combination L1, L2... the 2nd time i could make the combo then everything went well.
Ohhhh noo. Perhaps it would have been better to install OFW3.55 after rehash... I also got a CECHG04 but Im on DEX right now.
I'm soo scared converting back to CEX because I did it with Prel.Adv. and not multiman. But I want to try it, altough I got no hardwareflasher... Perhaps they also release the DEX-4.21-CFW *plz not flame me* I'm soo excited
Thank you soo much for your answer. What do you mean with "Raw NAND Flash dump" ? I got a NAND console. I dumped the 256MB via "preloader Advance (ver 3.1 i think)". I got all CEX-dump-files backed up: (the full dump with256MB, and the segmented onces).
And ofc I got the DEX-dump (which was converted from the cex-dump)
P.S.: Perhaps I try to dump a new DEX-dump via multiman and compare with my converted DEX dump?