My computer was running hot and eventually the error message appeared. I opened the case and found lint on the heat exchanger beneath the fan and the black-metal, finned heat sink dangling from just loop HS1 on the board. The pin device at HS2 is missing, pulled from the board as the chip overheated. I've ordered a new pin device from Dell, but if I need to solder the pin to the bottom of the board there is lots to do to remove the board from the case to access that bottom. How to re-attach the HS2 pin and loop? and, if the mother board must be removed, how to do that?