The Lenovo Thinkpad was fixed and it is working wonderfully. The repairman came and replaced the motherboard, sitting at our kitchen table; a guy about my age, who didn't want to drink coffee because then he would have to pee en route between destinations. It was a pleasure to watch him work at the computer, with his practiced hands. He had been working for IBM for 20 years. Asked whether IBM is a good company to work for, he said it used to be better, before the 2008 crash.