|I hope that the pressure was not too high since that could be a possibility.|
Was the routine maintenance or was this in response to overheating or other issues?
Look for loose connectors. Look for wires that now are being rubbed, pinched, or are bare and are grounding out on the case. Remove and reseat connectors and cards.
The more information you give us, the easier it will be.
You have to be a little bit crazy to keep you from going insane.