Question Help

Mar 22, 2020
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After playing on a pre-built desktop I bought for months, I wanted to check my components to see what I need to upgrade. I took out my graphics card then put it back and now it comes up with this message.” Please power down and connect all pcie power cables for all graphic cards.” I don’t know how to fixed it. I checked everything and made sure the power cable is plugged in and it still comes up with that.
if anyone knows what to do I would greatly appreciate it.