The bottom of the logic board, with the attached display processing board.

The ribbon cables are soldered into each board, so you cannot easily replace just one of the boards-- they seem destined to spend their lives chained together.

You can see the headphone jack on the lower-right side of the logic board. Apple has decided to integrate it into the logic board, which may make repair more difficult.

Notice the Foxconn logo on the 30-pin connector, indicating Apple's manufacturing partner.