Professional schematics and "boardviews" (which show the physical layout of components) are usually hosted on specialized technician sites:
containing the firmware and occasionally the schematics for the MDK-MB-17 W 1411-1. Repair Tips for This Model BIOS Reset Mdk Mb-17 W Schematic
Follow the AC input. The schematic will show a thermistor (inrush current limiter) labeled TH1 or R100 . If the board is dead, check this thermistor first. Then trace the DC bus after the bridge rectifier. Typical voltages: 140-160V DC before regulation. Mdk Mb-17 W Schematic
Understanding the Toshiba MDK MB-17 W Control Board The MDK MB-17 W Mdk Mb-17 W Schematic