I think the more interesting question is, would they? Let's assume they can build the computer, including all the supporting technologies, like electricity and

I think the more interesting question is, would they? Let's assume they can build the computer, including all the supporting technologies, like electricity and precise mechanics. What use case would they have where it would make economic sense to spend countless man hours developing it? Fortunately, all the component technologies are useful in themselves, so you could start by developing them independently, just like it happened naturally. Let's say you start with electricity. It's really useful right? Well, without a power grid, electric engines, industry to use the engines, and large electric power plants to supply a steady supply of electricity, it is really much less attractive. I'm doubting you could actually get a computer built until the civilization was ready for it, and there was a need.