Connect all of the previously connected cables from the back.

Cable may include the mouse, keyboard, monitor’s HDMI cable, Ethernet, and USB cables.

Connect the power supply cable back to the power and the PC.

If the switch of the power supply is off, please turn it on.

Test to see if the PC starts up without any errors.

If the computer does not start or gives you an error. Please restart this process from Step 1.