Thanks for the links. I did check them out but the service manual doesn't include the motherboard electrical schematics. I have tried notebookschematic.com and other sites including Ebay sellers of schematics and nobody has these. I don't know if these are too new or if Toshiba is blocking release of them. I used to repair cars and remember Honda and some other Japanese companies were considering their service manuals as proprietary and not releasing technical info to the service manual companies in order to force people into the dealerships, I suppose.