The banging fix was also useful for getting better reception on the tv set. Surprising how often it actually worked!
Chip creep was the behavior for chips to walk out of their packages due to temperature cycling, percussive maintenance helped reseat things, sometimes enough to make them work again.
(The Apple III was a beneficiary https://www.techjunkie.com/apple-iii-drop/ )
Re:The great junk transfer is coming
by QuercusMax on Thursday May 26, 2022 @05:53PM
(#31523785)
My dad always talked about lifting the front edge of a component up 2 inches and then letting it drop - he called it the "2-inch test". He said that either it would reseat whatever was flaky, or make it super obvious that it needed to be reseated.
TBH, as an electronics engineer and computer scientist it's the first thing I do too :) I think my point in that article was that we shouldn't teach that it's the _only_ recourse, and after if it still doesn't work then just replace it.
It's still one step better than the wisdom of my Grandmother's generation:
"If it doesn't work bang it once on the top. If it still doesn't work bang it hard on the side twice. If it still doesn't work, call a man."