Bootup, NO bios logo, black screen, but can hear windows sound

Hi, once in a while, when I boot, my screen is black and I can't see the Dell logo. However, after 30 seconds, I can hear Windows booting up, but still no screen. My screen is obviously connected to something, but it the light is green, instead of red, which means computer is either off or not connected. Please help me. Also, this most likely happens every first boot in the morning.
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More about bootup bios logo black screen hear windows sound
  1. Could be a faulty VGA cable so try a new one.
  2. The monitor screen may be faulty but its speakers might be working still so i think you should get a new monitor if that wont work you should or maybe some ports on the gpu are faulty you should switch the gpu if not then this is a serious defect or error glad to help :-)
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