Originally posted by p0ni
Yes, took me 3 hours to restore..
You have to download the official update 3.55, the put the PS3 on Safe Mode and update from there.
Restore and go back to OFW are two different thing, because when you restore is for delete all games,downloaded contents,etc. But when you go back to 3.55 (updating to the same version (3.55) via Safe Mode) is for revert the Jailbreak of the CFW so when you are in Safe Mode select the option "System Update"
Note: You have to put the 3.55 update in a storage media (pendrive,etc)
-Rep if I helped