This may come to a shock to many computer users but not everyone uses a computer, nor knows how to use one; both young and old.
Many users, even myself once, would have just purchased a new graphics card, stuck it in, and hope for the best.
Simply what happens is there is no display on the monitor; no, the graphics card isn't faulty, we've only connected the monitor to the wrong place.
Firstly, another name for a graphics card, GPU, is a video card, video (output) card. It is the device which enables the computer to send out a video signal to your monitor. The GPU also processors the visual displays you see, so the more powerful a GPU, the higher quality and faster rendering you can achieve.
Most budget computers in the past will come without a GPU, but the motherboard would have its own built-in GPU. It isn't as powerful and effective as a proper card, but it provides the visual display to get your computer working. Even some budget computers these days will continue to do this since excluding a separate GPU can save customers $150 and more.
Now, obviously, being the output slot, that's where you plug your monitor into. When a separate GPU is inserted, the motherboard will automatically disable it's onboard GPU and redirect all signals through the newly inserted card.
This means the monitor will be required to be plugged into the GPU instead because that's where the signal will come out from.
There's two ways of thinking about this, especially if you're new. Your new GPU must be providing a new display signal so connections need to go into that, or, the GPU is an add-on to the computer which runs in the background, just like the memory, RAM.
So if you've just purchased a new graphics card, plugged it into your computer, turned it on, and nothing is coming up, double check that you have connected the monitor to the right outout slot.
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