I can relate to what OP writes. I have refurbished ipad1, original IOS 4.3.3, jailbroke it with jailbreakme.com but also tried with something else, which did not work.
I want to send the device back, because I realised after three days ipad's screen is too tiring to my eyes. Have already contacted the supplier, no probs, the courier pending, but now i realise the device won't reset.
I get an aplle and a progress bar which does not move.
tried complete reset from ipad's menu, tried DFU and restore system through newest itunes update (PC). To 4.3.3 it did not work. Now I am downloading 5.01, but am afraid the restore may not work either.
On the desktop I still have ifiles, activator, backgrounder, not working curcitous, sbsettings - apps I am not too familiar with. Most importantly, the JB will probably be apparent to the APL techs.
What can I do? I wonder If apple may refuse the device now and what then...