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I just purchased a MSI P55-SD50 motherboard online to replace a Gigabyte board because the system was looping itself, and the power supply tested fine.
My problem is that when I installed the new motherboard everything turns on...but nothing from the video. I tried switching out graphics cards, and that did not fix the issue. Also attempted different sticks of RAM in all the slots...

Could the CPU be bad? I'm going to test that next, but would prefer to exhaust all other possible solutions before tearing down 2 computers mad.gif.

Any suggestions?