@SupEric

I have the same problem you had at the time of loading the image I get black screen and a blinking in the corner hairline.
Do you have the solution to this problem?
Could you help me fix it?

@Tom-Elliott
yes but,

I have a good connection and restart the computer and turn it off and still the same . I do not know what it is and not found.

The start of computers to display FOG PXE Then when they go to boot from the hard disk goes black screen the cursor flashes in the upper left corner and nothing happens.
Someone has the solution to this problem