IBM model M internal LED cable, yellow wires for (1987) 1391401 keyboard

Description

IBM original part, originally installed in IBM 1391401 keyboards from 1987 and 1390131 keyboards from 1986-1987.

Connects internal keyboard controller the Num Lock, Scroll Lock, Pause break keys.

Cannot be used in later IBM, Lexmark or Unicomp keyboards (1988 – 1999) without replacing the internal keyboard controller electronics module.