HT201177 My new Mac Mini is plugged directly into my tv via hdmi cable and the screen will abruptly go blank and then return after a few seconds. Why is this happening?

So I recently got a Mac Mini about two weeks ago and for some reason while I am on it the display will go blank and then return after a few seconds. It is happening very frequently. I checked the HDMI cable, I checked my tv and nothing seems to be wrong with them and I don't know what is going on.
I am getting a bit frustrated because this Mac is brand spanking new and it is totally acting up for no reason whatsoever.
Could someone please help me with this? I don't want my new computer to be useless. I need it.

Which TV model do you have?
Be aware of the fact that very many TVs do expect video signals on their HDMI inputs, not data signals from Macs or PCs. Please consult your TV manual if PCs or Macs can definitely be connected via HDMI, or if e.g. only DVI or RGB/VGA connectors are to be used.
In case of DVI inputs for data being present, it's not a problem if an HDMI->DVI adapter, or better, cable is being used.
Many users here are overlooking this potential reason for problems, assuming that HDMI outputs must always communicate with any HDMI input, certainly also because TV manufacturers do not "advertise" such limitations loudly.
AV receivers with multiple HDMI inputs and a single HDMI video output to the TV are typically more "tolerant" and provide a sort of "converter" function. If present, feed a Mac's HDMI signal into the receiver, not the TV directly. If the receiver does not have enough HDMI inputs, consider to connect rather a video source (DVD player or similar) directly to the TV than the the Mac.

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