I've got a CECH-G01 that will not play dvd/BR/games. Blue light comes on, disc spins, then nothing. I dont know the history of this unit but suspect that BR board is not original (currently BMD-004) so I wanted to remarry to motherboard. From the research I've done online I cannot do this without downgrading my firmware (currently 4.31). Is this something that can be done without soldering? I've seen dongles for lower firmware. Any thoughts?