I tried turning on PC I just built. Turns on fine but no monitor connection.

Solution
It's most likely that the motherboard needs to have a BIOS update before you can use that CPU. Either take the board back and exchange it for a 400 series board, contact AMD for a bootkit or take the board to your local pc store and get them to update it for you ( might cost a small amount).
It's most likely that the motherboard needs to have a BIOS update before you can use that CPU. Either take the board back and exchange it for a 400 series board, contact AMD for a bootkit or take the board to your local pc store and get them to update it for you ( might cost a small amount).
 
Solution


https://www.asrock.com/MB/AMD/A320M/index.asp#CPU
The BIOS probably isn't updated to run the CPU here is the list and the BIOS compatibility.


You need previous gen CPU to update it or a B450 board. AMD will also send you a boot kit with a CPU to update it.
 
To obtain the boot kit, please carefully follow these instructions:

Go to the AMD online warranty claims page: https://support.amd.com/en-us/warranty/rma
Fill in your full contact and product details (2nd Gen Ryzen Processor OPN number and serial number)
In the Problem Description field enter "Boot kit Required" (without quotes)
NOTE: The product must be a valid AMD processor with authentic OPN and serial number.

Once the claim is received and approved, confirmation details and boot kit instructions will be provided in a follow up email.
 
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Turn everything to the lowest. That computer is Definitely not one intended to play games