New build wont work?

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21 Apr 2020
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Sorry if this isnt the right forum but not sure where is. I am a complete noob and need help please Rig us as below:

B450matx motherboard
250 f force ssd
Red devil 580 graphics
Seasonic gold core 500w
Cit f3 casw
16gb vengence ram

So i built this last night as my first build. It turns on and fans go and graphics card lights up and all that good stuff. But i am still waiting for my monitor to arrive so i decided ill link it up to my tv through hdmi for now to set up bios and install os. Ive tried plugging the hdmi from my tv in both the hdmi slot in the motherboard and in the graphics card but the screen just says no cable connected? Any ideas? Do i have yo connect a DVI from the motherboard / graphics card to the monitor for first set up?

P. S i have checked the tv is on the correct input. Thanks in advance
 
Sorry knew i forgot something. My motherboard is :
ASUS Prime B450M-A Micro ATX Motherboard, AMD Socket AM4, Ryzen 3000 Ready, PCIe 3.0, M.2, DDR4, LAN, HDMI, DVI-D, D-Sub, USB 3.1, Aura Sync RGB Header

And cpu is ryzen 5 1600(12nm)

These were suggested as my go to build on an OC forum and checked by a few people so assume they are compatible.

The only usb i have plugged in is the keyboard to access bios.

Psu isnt modular. I assume motherboard main power is working if its able to power the 2 case fans and stock ryzen cooler fan?
This matx motherboard only has 1 gpu slot where it can be placed.

Ill look into the rest of the things when i can get back in
 
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I tried turning it on and it booted and im currently staring at my bios. Only thing i changed was i unplugged my mouse from the usb on my front panel. Guess it times to go ahead and install my OS. Back to YouTube. Wish me luck! Thanks for the helo Peter much appreciated
 
My front panel usb2.0 either go in to my usb32 or usb12 in my motherboard not sure which as the other 1 has the card reader usb olugged into it and i cant see which is which atm as the gpu is in the way. Ill know if the usb definitely doesnt work when i stick the windows installation memory pen in i guess
 
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