Manufacturers generally don't give out the electrical schematics. Best bet is to replace the mother board since they generally have all of the important components attached anyway.
I agree that is probably the case. I don't know how it is that the schematic businesses come by these eventually. I bought a schematic though an Ebay seller that had Toshiba satellite P35 schematics and they were good, just don't know how they originally came by these. I figure that motherboard repair operations either find a way to obtain schematics or put in the manpower to create their own. Sometimes there are advantages to troubleshooting problems in case there are simple repairable problems short of having major ICs reballed. Thing is I can get schematics for other Satellite family laptops, just not these and guess I don't know enough about the system to understand why.