Cannot get the PC to start


I have just purchased an Intel NUC 7i7BNH 1TB 2.5 SSD Windows 10 pro.  Start up yesterday perfect.  On shutdown the blue led lights remained on so I held the power button for 8 seconds to force stop the NUC, as I have done with many pc's many times.  

Plugged in to re-start and the red led light (indicating power) came on.  I press the power on button and red led light goes off but the NUC does not start-up.  If I leave it plugged in for a while (15 to 20min) it starts getting really hot so although silent, something is happening in the background.  The PC screen is completely blank and I have tried F2, F4 or F10 options after pressing the start button but the screen remains blank, as if no signal received from the NUC.  

Would love some suggestions on what to check next.

Many thanks
Robin KeuningAsked:
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Sam Simon NasserIT Support ProfessionalCommented:
is it under warrenty? if yest return it to the company your purchased from.

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Robin KeuningAuthor Commented:
I am not connected to it.  HDMI to the screen only.  LAN connected for internet.  Nothing more.
JohnBusiness Consultant (Owner)Commented:
Turn it off and make sure it is fully off.  Then leave it for 15 minutes.  

Now turn it on again.

Does that work?
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Robin KeuningAuthor Commented:
Sadly John no.  

It's been off for 15hrs and not plugged in.  Tried again and same result.  When I plug it in the red led lights up.  When I press the on switch the red led turns off and nothing (the blue led lights lit up when I turned it on the 1st time, now they don't).  After 20 minutes it appears to be heating up so I unplug as clearly something is horribly wrong ;(

JohnBusiness Consultant (Owner)Commented:
You said it was new. Can you return it under warranty
Sam Simon NasserIT Support ProfessionalCommented:
no feedback from the user,
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Intel NUC

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