If you switch to ubuntu18.04, you will have the same problem.
Although you can continue to install down, there will be serious errors in the end (the actual error is not clear because of the blur)
I suspect that n graphics card is not supported, or the screen is 144 Hz (this is my personal guess)
May I ask if I have any suggestions for my question?
There is also a problem iso 1.48 GB is the size provided by the elementary official website, but the actual download is 1.37 GB
Is it normal?
10/2 18.20 supplement
When I have the above situation again, I directly unplug the usb and the screen will display normally (although I can't continue the installation to force the shutdown)
So I have guessed that the USB flash drive problem (the drive itself is brand new), so I tested it with FlashTester.
No problem with results.
After that, I tried other usb holes and found that the front plate has the same problem, so it is not a separate problem with the usb hole.
Another point, I am using dp line transmission.