Just received PS3 slim CECH-2504A with datacode 1A.
Connect e3-flasher, backup firmware, check it with FlowRebuilder.
Then press "downgrade". When process finished - I received brick.
I restore bumped firmware and console turns on!
Then I patch dumped firmware with dospiedras_v2 and flash it with E3-flasher.
There is my NOR dump: http://www.megaupload.com/?d=D1SG7J46
Is it downgradeble? Or I must forget about downgrade on this consoles ?