[guenthert]

I recently turned on a PC some ten years old which was in storage for five years. First time it turned on, but had difficulties booting due to the M.2 SSD from Intel being corrupt. Second time, it failed to turn on (but some LEDs on the MB indicated that there was still some power), fans not spinning. Third time, it did start again, but the fans at full speed and fan control not working anymore. It seems the lubricant of the fan's bearing dried up and made them hard to spin to the point that the in-rush current exceeded the capacity of the fan-control chip.

Fortunately, those beige^black boxes hold no sentimental value whatsoever and will be replaced with something better at a convenient time. Before turning on something more rare, I'd inspect the MB visually for corrosion, bloated caps and test the fans and disk drives externally.