So the resolution or refreshrate is out of range, and the settings need to be lowered. When the computer is starting up, before the windows logo comes up, tap repeatedly on F8 to get Advanced start up options on the screen.
Select VGA mode from the list and press enter, the computer should start up in a lower setting and you should see picture, then you can right click on your desktop and select properties, then click on the last tab - settings, and adjust the resolution to 1024x768 or similiar, but not too high or the problem will return.
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