Question PC Problems Head scratcher

Jan 12, 2019
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I have a PC that powers off randomly and the fans go on high and it turns off. I have replaced just the power supply and it didn't help. I replaced the motherboard twice and it wouldn't boot. I took out the graphics card and still nothing. When I put old parts in it boots.
 
Jan 12, 2019
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Do you think that the old motherboard would allow a failing CPU to boot and a new motherboard would not?
 
Jan 12, 2019
3
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10


It is the weirdest thing It turns off and fans go on high. New PSU still did it and new motherboards wouldnt post. Checked ram too. Might just buy a new mb, cpu and ram.