PX-750A firmware upgrade went down hill

I tried to upgrade my PX-750A firmware 1.01 to 1.03. Everything went ok. After I tried to burn my first DVD at 8x, I got an error saying that shor-leadout cant be written. Then I downgraded the flash with their software, again, same error. Interesting thing is that v1.02 doesnt support 8x then nero listed it does. So, again, I downgraded, same issue. Now I`m stuck. Any suggestions ? Would a re-flash be possible ? If so, how should I do that ? I mean, totally erase the firmware and redo it.