How to power cycle
Here is the guide on how to power cycle your computer.
Make sure to power cycle both PC by doing the following
1) Turn off your main pc (Via Button or shutdown on windows)

2) Unplug the power cable to the computer from the back

3) Hold the power button of your computer while it is unplugged for 30 seconds and then release (To release any stored power)

4) Plug the power cable back into the computer

5) Power on the computer

Try this if you're having issues with your DMA card, do on BOTH PCs