Originally posted by Obeyabnormalbiz
Cech_2501b
You can use a tool like MinVerChk to check your minimum firmware that the PS3 can be downgraded to.
You can download it from
You must login or register to view this content. Once you do so, place it on the USB as if it were an update file. /usb_000/PS3/UPDATE/PS3UPDAT.PUP/.
Go to System Update and Update via Storage Media. Do not worry, the update will fail. But when it does, it will tell you to Insert a file update above *firmware x.xx*. That is your minimum firmware.