I own a Dell XPS 720 H2C computer, today my computer overheated and shut down. Evidently my cooling system has ceased to function properly. I cleaned the radiators and cooling fan and checked to make sure that the pump was running and everything seems to be in order. The hoses running from the CPU and heatsink were hot to the touch so I assume that the water is not circulating the way it should. After reading up on these systems it seems that they are not servicable or are extremely difficult to mess with. Any ideas or comments would be greatly appreciated. Also is it possible to use and XPS heatsink and fan for the CPU in the meantime until I can address the H2C problem.