No disks boot at all with the O wire connected , once i disconnect the O wire i can boot up original cd,dvd and dvd rom ,there is no bridging on the soldering as i,ve checked it all with a continuity meter. The ps2 was working fine with chip fitted then all of a sudden this happened, maybe a dodgy chip i suspect. I,ve got a couple here so when i get a moment i will try changing it
