Problem! Help! V7 Infinity Sound!

help people i have just installed a matrix infinty chip into a v7 ps2. at first i got a black screen, so i re- soldered the ground and the y wires to solve this. the problem that i am having now is that i cant get access to the chips configuration (triangle + circle). it gives me a disc read error when i try to upgrade it. but it plays ps1 backups which are on exactly the same media. it also palys dvds /backups but all with no sound. i have also changed the leads going to my tv with a friends and no sucess. if anyone knows how to solve this any suggestions are welcome and appriciated.

check points M,N,O,P