Another bad fan day…
The CPU fan has been making noise for a couple of weeks. Today the machine hung at about 15:00. When I tried to reboot it, it acted kind of flakey. The CPU heat sink was hot to the touch, and the fan was rattling. The BIOS reported the CPU was at 113F. So I went to Best Buy and got a new fan. Now it reports 105F and 5900RPM.