Don't worry, the multimeter doesn't use 9V when tracing. Those scans will take us quite a long way, but we will need to trace some signals. Also, we will probably need to sacrifice a player and remove the BGA's just like we did with the H100 and H300.
I find it very interesting that there is an unpopulated 20-pin ZIF connector on the PCB. It might very well be a BDM connector.