Arghhh, so I was asked to upgrade the #Fujitsu #Celsius #W420 of our neighbors. New GPU, more RAM and new SSD. Now the lovely PC is not booting after they cleaned it with compressed air. and I don't have any output on the onboard DP. Of course we don't have a DVI Monitor and Cable. I rebuild it now with the original components and have a go at the second PC of them changing one component at the time. #TechSupport Horror.