As we all know, rebug firmware is abused in the ps3 modding scene but. It's not really as good as people say it is, Don't get me wrong i like rebug. but it has so much **** going on that it overheats faster "common in fats" but that's not the point. Rebug firmware don't have as good as support features. My disc tray broke and when i was installing a rebug firmware. Witch rebug don't have the blue ray drive patch so i am making a modifed firmware that supports rebug toolbox so i guess you could call it rebug. But i'm adding alot of stuff that will make the system alot. Smoother and for the people stuck on the update loop due. To Installing an non supported blue ray drive firmware consider your self lucky. So i'm just gonna explain how to stop the loop and get to safe mode to Install a blue ray drive patch supported firmware either you could find one on the internet or wait for my rebug toolbox supported 4.70 dex firmware with blue ray drive patch so all you have to do is remove the hard drive and on one of sides next to the connecter for the hard drive. Is a wire connecter, now i do not know if it could be charger or what ever to connect but hook that up to your pc. And go to disk mangement and format it there your done. All you have to do now is put it back in. "For people thinking this is gonna remove your cfw it will not you will need to reinstall updates dlc and stuff but who cares your getting back to your xmb" now go to safe mode and install a disc drive supported firmware that has the patch like rogero i think has it. Or wait till mine releases up to you so now go to system update make sure you have made folder called PS3/UPDATE/PS3UPDAT.PUP and put it in right slot aka developer port. Now install it and it will exprience no errors and you will open homebrews with no blackscreen But, if you are deciding going back to rebug then i wouldn't if your disc drive is broken they brake so easily in the older models of fats anyways hope this helped!