This cartoon is so old and clichéd -- dig the size and edgy modern design of the "monitor" atop the "computer" -- that the original must have been inscribed on the walls of the tech support unit at Lascaux or Altamira since the days when there wasn't even any Hollywood:
Today, A.C. Douglas delivers a blow by blow, first person account of a real-life contemporary equivalent.
[I recently experienced the extraordinary non-obviousness of the new Microsoft boxes firsthand when we acquired a set of the new Microsoft Expression web design tools. After some headscratching, I managed to obtain access to the box's interior without resorting to the tool chest. For reference, and so that you may henceforth follow the path of nonviolence, here is a a handy illustrated how-to.]