Okay, this has been quite an annoying day, so apologies if I've somehow missed answers elsewhere here, but I've been pouring over this and other sites with little to no luck but tons of annoyance for 6 hours now... and I'm past the point of frustration.
I have a PS3 Fat, 60gb, kiosk unit that has, over time, been upgraded to 3.50 firmware. I'd been waiting for ages to see if anyone came up with a way to convert it to retail, and was thankful to see that someone had.
I picked up a Teensy++ 2.0 before realizing that someone later released a way to convert without downgrading... but upon following the procedure for PS3MFW Kiosk2Retail, my console kept giving me "data is corrupted" errors no matter what (reformatted USB stick, reformatted PS3, alt downloads on other computers, nothing fixed it).
So I reverted to trying to make head or tail of the tutorial on PS3 News "How to Turn PS3 Demo / Kiosk Consoles Into Retail with JailBreak" and after multiple attempts to find the proper files (it's not exactly clear from just that post), I was underway... or so I thought.
The downgrade never took... it just ran with a blinking power light for about an hour. A very similar thread on another site about the same process mentioned this might happen and suggested just powering the unit off in this case and continuing the process. So this I did, followed by removing the USB stick, removing the 2 files, and placing the other lv2diag file, etc etc.
Aaaaand... nothing. Machine will now not boot at all... it "tries"... but just powers off. I can get it into service mode, but I can't do much from there anymore.
I would have tried to simply upgrade it from the 3.50 it "thinks" it has to some other version IF I could find a single place on the web, usenet, whatever to actually GET kiosk firmware.
However, sans an option for going forward, and sans an option for going backward, I'm left with a rather expensive brick, a good chunk of my day shot to hell, and an overwhelming urge to shoot the damn thing with chemical propelled projectiles.
Is there any chance that someone here might have some thought as to how I can get out of this mess? Again, apologies for the long post and/or possibly pissing someone off for missing a FAQ, but I'm completely burnt out and unable to google my way out of this hole.