The motherboard serves as the hub for all external and internal connections:
• external ports: 2x usb 3.1 gen 1, 1x hdmi 1.4, 1x micro sd card reader.
• internal headers: dedicated connectors for the battery, keyboard, touchpad, speaker, world-facing camera, and a specialized sensor cable (for the 360-degree hinge/tablet mode).
• daughter boards: uses a separate small board (io board) for the audio jack and power switch, connected via a ribbon cable.
3. common part numbers (for replacement)
if you are looking for a replacement board, match these dell part numbers (p/n):
• 8gb ram / pentium n4200: 0d493 (cn-00d493), fh91c
• 4gb ram / pentium n4200: fv31v, 0fv31v
• 4gb ram / celeron n3350: cxx8y, 9mjry
4. important repair notes