20GB US model on 3.41, service mode enabled with psfServiceMod (
klutsh.com), all hashes generated with hashtab
Downgraded to 3.01 with original PUP from COD: MW2 (BLUS30377) disc
PS3UPDAT.PUP - 268435456 bytes - MD5 hash 59E7C4E39AF57DB067C65814A9D33F0B
(FILE 1) Lv2diag.self - 374272 bytes - MD5 hash 90168C03B217CE775A7839D87BBFF2A3
Exit service mode with
(FILE 2) Lv2diag.self - 206256 bytes - MD5 hash 7A20BFDAE65EEFB47A4425DB1B52DCDE
Downgrade confirmed, bluray restricted as well. (update log attached)
Tried all options in the restore menu and bluray playback still restricted. Updated to official 3.41 FW (175193760 bytes - E07D2B84C9E9691C261B73E5F1AADA20 MD5 hash) and bluray playback still restricted until restoring dev_flash3 which fixed bluray playback.
After restoring dev_flash3, ps3 was put in service mode, and then taken out of service mode with the same files / method as above, bluray playback was not affected (still works)