I can only use my computer in Safe/VGA mode, help much needed!

Hello,
Recently, my computer suddenly developed a fault where if started in ‘normal’ mode, there would be lines breaking down the Windows loading screen, and would end up going to black with no signal being sent to the monitor.

I can only get to the desktop and use applications if I use the F8 function whilst loading to start the computer in Safe Mode (with Networking) or VGA Mode.

I really don’t know enough to know the cause of this problem or how to fix it on my own, so help would be much appreciated as this is so frustrating!

Thankyou for your time,
James Spiridion