Dell Chromebook 3400 USB IO Board 30-pin Ribbon Cable- genuine Dell OEM Ribbon Cable that connects the USB IO board to the motherboard; for the 3400 laptop. There are two cables that connect the IO board, this is the 30-pin cable.
Compatible Dell Laptops:
-Chromebook 3400
DPart Number: 3XRT5
Alternate Part Number's:
EDB40
NBX0002FT00