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Teensyduino Code, Eagle layout and PDF documentation at:
https://github.com/thedalles77/Pi_Teensy_Laptop
Features
Circuit board connects Teensy to 24 pin 1mm pitch FPC connector and breaks out all other I/O
Scans a KFRMBA151B Sony Vaio keyboard and sends keypresses over USB.
Communicates via PS/2 with the Sony Vaio touchpad and sends the data over USB
Replaces the control pad for a M.NT68676 video board
Receives commands over I2C to shut down power or reset the laptop

I converted a Sony Vaio PCG-K25 to a Raspberry Pi 3 laptop with a Teensy ++2.0 as the controller for the keyboard, Touchpad, and Video Card.
The following picture shows the Teensy and other boards in the laptop.
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This is the finished laptop
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