I follow the steps below but now no display at all. Please do assist on it as we couldn't use it since 3 weeks ago.

Disable and Re-enable the Display Adapter:

a. Open the Device Manager (you can find it by going to the Start menu and typing "Device Manager" into the Search programs and files box)

b. Expand the Display adapter’s node

c. Right-click on the display adapter (e.g. NVIDIA, Intel)

d. Click on Disable

e. Start DraftSight and try to work. Does it work?

f. Close DraftSight

TIP: Don’t forget to go back and re-enable your display adapter.

If disabling particular graphics adapter helps to resolve the issue then it is most likely due to graphics card hence you need to update that graphics card driver or keep it disabled.

After disabling graphics card you may experience some display issues however this is a just a test to confirm if the instability issue is not related to graphics card.

-if your graphics cards drivers are not updated to latest, Visit the Graphic card manufacturer's website and download and install the latest driver for your machine and test the issue again.