E93839 Motherboard Schematic [patched] -

You should search for: or "Wistron 13269-1 Schematic" (Wistron is another manufacturer for these boards, and the boards are often interchangeable/identical in layout).

If you locate a PDF schematic for your specific board model, focus on these critical areas for troubleshooting: Go to product viewer dialog for this item. E93839 Motherboard Schematic

Trace the USB D+ and D- lines from the connector (J1 or J2) through: You should search for: or "Wistron 13269-1 Schematic"