E93839 — Motherboard Schematic

: Includes the communication lines (SMBus, LPC) between the chipset (PCH) and the Super I/O chip. Availability : Official schematics for desktop boards like the Dell Optiplex 780

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). E93839 Motherboard Schematic

While it may take time to locate the exact revision for your board, the effort pays off. Combine the schematic with a multimeter, an oscilloscope, and a steady hand, and you can resurrect external drives that manufacturers declared hopeless. : Includes the communication lines (SMBus, LPC) between