EVGATech_MDecker
Hello chispy123,
 
based on your testing so far I would highly doubt it is a driver or software issue. I know you dont think the cable is to blame but 9 times out of 10 this problem is related to the cable.
 
How long is the HDMI cable you are using? Have you tried testing another HDMI cable to another display or the same display?

chispy123
** SOLVED**  just when i was about to give up on this problem that i have been trying to solved for the last 4 days , and was close to rma the video card i have solved the black screen signal lost problem today.
 
* It is an nvidia driver bug *
 
"symptoms"
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Display Screen will go black with a signal lost coming from the display , it will last from 3 to 5 seconds and then the signal comes back to the display back to normal. It will happen intermittent more or less every 15 to 30 minutes , sometimes it will happen more frequently at intervals of 3 to 5 minutes. This will happen with normal use while browsing the web , watching youtube , just sitting at the desktop and gaming.
 
Hardware that might be related and or affected by this black screen problem:
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I am using a Vizio 50'' D50u-D1 UHD 4K 60HZ  Smart TV as my display connected with a HDMI cable from my video card eVGA GTX 1070 SC Gaming Black Edition ACX 3.0 HDMI 2.0 port to my HDMI 2.0 port on the display.
( HDMI connections to 4k 60Hz UHD displays might be affected by this nvidia driver bug )
 
Software that might be related and affected by this black screen problem:
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Windows 10 Pro x64bit Version 1607 ( OS Build 14393.693
Nvidia drivers WHQL 378.49
 
Solution for the Black Screen lost signal display driver bug problem:
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This bug will happen only at 4k resolution running at any Hz , be it 60Hz , 59Hz , 30Hz etc...( It will not happen at any other resolution ) , using HDMI conection from the GTX 1070 to the display HDMI connection.
 
If you suffer from this problem try the following temporary fix.
Steps for the temporary fix until a new driver with a fix is release by nvidia:
1. Turn Vertical Sync ( Vsync ) OFF 
2. Reboot your PC
3. Change your resolution from 4K ( 3840x2160 ) 60Hz to 1920x1080 60Hz and reboot your PC
4. Change your resolution back to 4K ( 3840x2160 ) 60Hz
5. You are done and the problem it's fix temporarily , it will reappear again if you turn ON Vertical Sync on the nvidia driver control panel and or sometimes if you boot your PC at 4k ( 3840x2160 ) 60Hz , you need to boot at 1920/1080p 60Hz then once windows is loaded change the resolution back to 4K 60Hz.
 
This nvidia driver whql 378.49 bug i can reproduce it again and again 100% all the time. Bare in mind that this bug might be happening on my hardware configuration only due to the complexity and differences between hardware configurations out there , but may as well be happening to other similar hardware configurations as well , as a temporary fix please follow the temporary fix guide that i wrote.
 
I have submitted a bug report to nvidia ( NVIDIA Display Driver Feedback ) and will contact Manuel G. Nvidia rep at Guru3D to let him know about this bug.
 
Thank you everyone that did their best to help me out , appreciate it all the help.
 
Kind regards: Angelo