Trouble downgrading PS3 Fat...

**PhoenixWright** · 12-27-2010,09:14 AM

I have a SuperAVR USB Development Board AT90USB-162 running at 8mhz.

I was able to get jailbreak my PS3 Slim with this board but for some reason I can't downgrade my PS3 Fat (Firmware version 3.50) with it. I properly loaded ps3yespro_1_0.hex to the dongle. When I put it on my PS3, the light on the dongle turns red but nothing happens. Am I using the wrong hex file?

Pics of by at90usb board:
http://i285.photobucket.com/albums/l...R/IMG_6922.jpg
http://i285.photobucket.com/albums/l...R/IMG_6920.jpg
http://i285.photobucket.com/albums/l...R/IMG_6916.jpg

**Chris_79** · 12-27-2010,05:23 PM

Correct me if I'm wrong as I Downgraded and Jailbroke with an Ipod photo, but I think you would need to flash a downgrader hex (ex: PSGrade) to your board first. then flash the ps3yespro_1_0.hex to JB once you have 3.41 or lower FW on your PS3. I found a link for your PSGrade Hex here

http://www.ps3-hacks.com/file/218

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