Your desktop may not be starting or may not have a display for a series of reasons. Here are some potential causes and fixes.
 
Loose Monitor and Power Cable
  • Make sure the power cable has been plugged in properly.
  • There may be a problem with the cable between your system unit and monitor.
  • VGA, HDMI, or VDI cable replacement
  • If that still doesn’t work, try connecting your computer to a different outlet. Use a wall outlet instead of a power strip or surge protector if you’re using one.

No Display on Boot

  • Force restart your desktop by long-pressing the power button.
  • After the forced restart, try Windows automatic repair.

Internal Peripherals

  • Try taking the RAM stick off the motherboard and putting it back on.

Power Supply Unit

  • Verify the power supply’s functionality and that it is linked to a power source.