Sounds like a bad Motherboard, at a guess. Either something isn't plugged in right, a RAM stick worked loose, or an actual component on the board itself has failed.
and yeah, I've it happen to me a time or two. I don't think I've ever had an actually new new computer, so I've gotten used to things failing, and fixing or replacing them.
appendium: I did have a very similar failure pattern and it turned out to be a bad PSU. Once. Recommended you check that as a precaution. [mostly because the darn PSU was brand new and I spent three days chasing my tail until I tried that. If I can spare someone else that frustration so much the better.]
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Sounds like a bad Motherboard, at a guess. Either something isn't plugged in right, a RAM stick worked loose, or an actual component on the board itself has failed.
and yeah, I've it happen to me a time or two. I don't think I've ever had an actually new new computer, so I've gotten used to things failing, and fixing or replacing them.
appendium: I did have a very similar failure pattern and it turned out to be a bad PSU. Once. Recommended you check that as a precaution. [mostly because the darn PSU was brand new and I spent three days chasing my tail until I tried that. If I can spare someone else that frustration so much the better.]