u/IdealMindless2928

Hi everyone! I have a problem with my HP Z2 computer. I can't log in to the bios and when I put the computer in safe mode and restarted it, the computer starts up and I hear the Windows startup sound, but the screen is completely black. I've tried changing different ports but no image appears. What could be wrong? All instructions are appreciated. It's annoying that I can't use the computer.