Question Monitor of first build shows no signal, please help!

Apr 26, 2020
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Hello guys, I am building my first PC and have been running into some serious trouble. I am honestly getting desperate as everything I tried is not working. I continue getting "no signal" on my monitor. Any help is greatly appreciated as I am starting to get desperate.

here is my build:
Motherboard: Gigabyte b450m ds3h (on the box it says "AMD ryzen 3000 ready")
RAM: Corsair Vengeance LPX DDR4 3000 MHz 2x8 GB (16 GB) RAM
CPU: Ryzen 3 3200G
GPU: Gigabyte Radeon Rx 570 Gaming 4G
PSU: Gigabyte PB500 80 plus bronze
SSD: NVME WD Blue SN550 500 GB
An old HDD I had lying around
and some fans

When I click the power button, all the system fans, CPU fan, motherboard RGB, PSU fan, and GPU fan turn on. However, I get no signal on my monitor.

I have tried the following things:
-Turn off the computer and unplug it from the PSU, then hold the power button for 5 seconds
-Take out the RAM and put it back, switch the slots it is in, run only 1 ram stick at a time
-Power up without the GPU
-plug into the HDMI port of the motherboard and of the GPU
-Use multiple monitors
-Take out the motherboard battery
-Using a different CPU (originally I purchased a ryzen 3 2200G open box from Canada Computers, but when I wasn't getting any signal, I took it back, they tested to see if its actually defective and refunded me.)
 
Did i overread the part where you told us what monitor you use?
You are connected via DP -DisplayPort ?
Because noone in 2020 should use HDMI, its bad quality.

resolution and refreshrate?
maybe the PSU inst strong enough, but i have no idea..
 
I do not have a dp to dp cable, the monitor I am using is an Hq Compaq LA2405x. (the way I connect to this specific monitor is a hdmi to hdmi cable with an hdmi to dp converter. As for the PSU being not strong enough wouldnt the computer just turn off or something? PC part picker shows my watt usage is significantly under 500W anyway