Update October 25, 2021 = After explaining warranty policy, completing troubleshooting, a DELL-Cares agent setup service.
Today, I just received the computer. When I used it, the screen began to flash, accompanied by intermittent black screen, which will lead to no response to clicking anywhere. But there will be another response if I return to the desktop. Such a flash screen will appear about once a minute.
x17 R1, flash screen, black screen