This barely has any point but I might as well post it, cause it's pretty cool. lol
THIS IS NOT REBUG FIRMWARE! YOU MUST FOLLOW ALL THE DIRECTIONS CAREFULLY! NOT DOING SO MIGHT RESULT IN BRICKING YOUR PS3! DO NOT EXIT SERVICE MODE!
You must have 3.41/3.50/3.55 firmware and a jailbreaking device, capable of downgrading. If you have the new 3.56 firmware, then sorry but there's nothing you can currently do. Here's the Tut on how to downgrade for 3.55 You must login or register to view this content. (I'm only providing that as most people are on that firmware. To downgrade on 3.50 find the files for that firmware and do the same except steps) Instead of using the 3.41 PS3UPDAT.PUP as provided with the downgrade files, replace it with 2.15 debug firmware You must login or register to view this content. Now do HALF OF THE DOWNGRADING PROCCESS (dO NOT DO THE END PART WHERE YOU PUT THE SECOND lv2diag.self (FILE 2) IN! Doing so will most likely brick your PS3! (Not sure if it will but you never know) So now your ps3 should be in service mode and have REAL debug firmware. The thing is, some (if not most) of the features may not work correctly but it is always nice to see what the debug features are.
And I knew about this for awhile, as this isn't really new. I did not find this, but I did make this tutorial.
I'm still testing things with that so idk if it'll actually work lol Maybe it can if we change the payload via jailbreaking but idk. I think it could work but I don't want people bricking their consoles haha