Downgrade / error

Hi Guys,

I'm opening up a new thread, just to put everything down. Maybe a bight user can help me out as i 'm stuck.

1) I completed the downgrade procedure up until the QA Toggle / Dehashing part. I misunderstood the guid, which refered to installing a QA Toggle, which i misunderstood for the code on network in the XMB.

I didnt install a QA Toggle and upgraded to OFW 3.55

2) After upgrading, the console didnt work anymore. I dont recall a RLOD, but no picture. The console stayed on though.

3) I asked what to do on PS3Hax and i was advised to reflash my orighinal dump ( which is valid ) through Flashfun. The original dump flashes perfectly, but no screen, USB or harddisk activity.

4) I then tried flashing the downgrade again but upon flashing the E3 Flsher errors on 11001000, (11001000 Wrong PS3 version, not supported at present)

PS3 : Stays on, but no screen, no hd activity ( besides booting swoosh sound ), no USB activity.

Questions :

1) Can i flash my 4.XX firmware in funflash over the OFW 3.55 ? Is this what is giving the 11001000 error ?

2) How do i proceed ? Dont know where to start or what to do.

Anybody ?