If you are looking for the full document to assist with a hardware fix: Wistron Nirvana 13 Schematics
Part numbers like 10261-1 are often used by manufacturers such as Allen-Bradley (Rockwell Automation) , Siemens , Tektronix , or specialized OEMs in CNC (Computer Numerical Control) and PLC (Programmable Logic Controller) systems. Based on pattern recognition, this number strongly correlates with legacy I/O (Input/Output) interface boards or power supply control modules. 10261-1 schematic
(Unified Memory Architecture) integrated graphics rather than a discrete GPU. Power Architecture If you are looking for the full document