I have an old (maybe 15 years old ) which has started making a noise when first turned on. So far, it has come out of it and ran smoothly after a couple of minutes and it works fine.
I haven't tried to take it apart, but some of the ones of similar age I have and I believe I can expose the bearings. I have seen computers advertised which mentioned that "they had had their harddrive repacked"
If I try it, what lubricant would I be advised to use? The choices would likely be: chassis lube automotive grease, vaseline, 3 in 1 oil, military surplus rifle oil, 30 wt motor oil, cod liver oil, and maybe even the silicone used on electrical connections.