Unknown. See on the fritz, which appeared in 1902. Possibly from German name Fritz, or onomatopoeia.
Meanings
(intransitive) To go wrong or become defective.
One clip, of Talking Heads playing “Born Under Punches” in Rome in 1980, is shot largely at groin level, amid sound equipment that is being manipulated for feedback squeals and other effects; it’s like being close to the crooked spine and fritzed nervous system of a body that’s simultaneously pushing its sex appeal. 2008 May 18, Virginia Heffernan, “Pixels at an Exhibition”, in New York Times:
My brain was fritzing like an elderly TV set about to die. I hit the side of my head with the heel of my hand. Percussive maintenance. It didn't work. 2009, Jaqueline Girdner, Murder, My Deer, page 15: