Cedar

What about PWR connector? Have you tried shorting the pins on the motherboard to make sure that power buttons isn't faulty?

Ya sorry bout the computer knowledge, I'll get the Windows USB and giver her a try thanks m8

Thank you are my savior 

Have you power cycled the machine? you should be able to access the bios, if you turn it off and on again and the monitor won't change it is probably a problem with your display, the display cable or the display port(s). 
 
If that doesn't work get a windows installer usb and boot to it and get advanced startup options. You should probably reinstall windows which is recommended when you get a new motherboard. 
 
Also I don't mean to sound passive aggressive but it is spelled "Ryzen" not "Rizon". Also ryzen CPUs use the AM4 socket not the AM3+ so your cpu is Not a ryzen. 
 
good luck man. You'll get it

you could go with a vega 56 and do a bios flash to get performance like a vega 64

Better CPU and GPU: 
PCPartPicker Part List Type Item Price CPU AMD Ryzen 5 2600X 3.6 GHz 6-Core Processor $139.99 @ Amazon Motherboard Gigabyte B450M DS3H Micro ATX AM4 Motherboard $59.99 @ Amazon Memory G.Skill Aegis 16 GB (2 x 8 GB) DDR4-3200 Memory $52.99 @ Newegg Storage Silicon Power A60 256 GB M.2-2280 NVME Solid State Drive $33.99 @ Amazon Video Card MSI GeForce GTX 1660 6 GB VENTUS XS OC Video Card $184.99 @ Newegg Case Corsair 100R ATX Mid Tower Case $29.99 @ Newegg Power Supply Corsair CXM (2015) 450 W 80+ Bronze Certified Semi-modular ATX Power Supply $34.93 @ Newegg Mouse Corsair Harpoon RGB Wired Optical Mouse $17.99 @ Best Buy   Prices include shipping, taxes, rebates, and discounts     Total (before mail-in rebates) $609.86   Mail-in rebates -$55.00   Total $554.86   Generated by PCPartPicker 2019-11-28 00:05 EST-0500    

2nd i think lol - dennis looks very innapropriate in the thumbnail... haha

120GB would be the minimum I'd go for now. Windows update files can eat up the space on a 60GB pretty quick.