Welcome, this page will serve as a guide to how you can install a Raspberry Pi into an Atari Lynx II

Parts List

Atari Lynx II (broken) – About $25 on eBay
Flat panel Ribbon connector – From existing Lynx board or Digikey (http://www.digikey.com/product-detail/en/molex-connector-corporation/0039532145/WM2861-ND/2405232)
Raspberry Pi Zero/2/3 – $5-$40
3.5″ Composite TFT Car backup monitor (Amazon, Ebay) – $17
32 GB Class 10 Micro SDHC Card -$15
Adafruit 2500mah or 4400mah flat Lipo pack w/JST connector – $15
Adafruit Powerboost 1000C – $20
4 Port USB Hub
Edimax Wifi USB – $10
Philmore slim power switch – $2
40mm 8 Ohm Speaker – $2 on Ebay

USB Keyboard for setup – Owned existing
40 pin IDE cable or breadboard hookup wires
Hookup Wire
Electrical Tape
Hot Glue
Shrink tubing (various sizes)
Solder
USB Keyboard for setup – Owned existing