360 hasn been played an shuts off after 5 min of play with two

The cpu and gpu quickly gets hot if you have faulty fans and or the heatsink pads have disintrigated,
Try using a vaccum cleaner to remove any dust from the vents.
Listen and check for fans running and lastly you may need to do the x clamp repair mod.

If fans are running and all vents are clean and your warranty has expired on the console (check with microsoft), then go to ebay and look for x clamp repair kit and purchase the kit it should come with steel washers, heat treated nylon washers, screws and thermal paste. Make sure the seller also includes a guide on how to do the repair. These mods are pretty cheap BUT INVOLVES OPENING YOUR CONSOLE SO BE CAREFUL AND WILL VOID ANY WARRANTY.