How are you certain that the power is getting to the board? Toshiba is notorious for bad power connectors or broken solder on the power connector.
I applied power (15vdc) and measured it on the board with a multi-meter, I inspected the solder joints and they looked good. I also checked for a short between the center conductor and ground prong, there was none.
The laptop is torn down and there are no obvious signs of solder joint failure. I have been certified to solder per IPC 610, Class 3 and performed micro miniature circuit board repair in the Navy for 2 years.
Thanks for responding...