Thanks for the ideas. It is a puzzle. TM shows the cpu running at 3 to 5% constantly, which should not be enough to explain the power draw and heat. I wonder if it could be a conflict with the video drivers. I probably will do a clean install of the latest win 10 next.
My laptop is about 3 years old, an Asus R510D with amd A-10 quad core 2.5 MHz, 8gb ram and originally windows 8. Either last summer or the year before, that bespeckled nerd, Bill Gates and his minions tricked me into installing windows 10. You know the ol "it won't be free after next week.."...