I got another RX 6700AMD card to try again, turned out was the cable all alone. Though was a high speed HDMI cable turns out the card would need higher spec cable of 10 meters which was the length in my case. Tried a shorter cable and there it was. Ordered a digital directional HDMI cable of 10 meters and I should be good to go. 
Helloguys, Coming back to playing games during the rubbish few years as you know, thought I would upgrade my graphic cards from GTX 980 SLI to an AMD Radeon RX 6700 XT. Initially the system went through a few cycles of rebooting, then nothing. Eventually got an output to my Screen, Sony XE93. After spending hours and days could not get the AMD to display any video output. This was after down loading DDU and doing all the clear install. System turns on and fans on the AMD spin for a few seconds then stop, with no possibility to even get into BIOS. I remember I got the highest power PSU 1,500W. I've since returned the AMD card to Scan computers. Would like to give this another try as currently off work for a while. Any help appricated.
Area-51 R2, AMD RX 6700 XT not working