Which motherboard?
If your using a H310/B360/H370 or Z370 without a newer motherboard BIOS installed then that could be the reason for your issue. Only the B365 & Z390 boards support 9th gen Intel out of the box.
Here's also a checklist incase you overlooked something during assembly.
"No POST", "system won't boot", and "no video output" troubleshooting checklist
"No POST", "system won't boot", and "no video output" troubleshooting checklist This checklist is a compilation of troubleshooting ideas from many forum members. It's very important to actually perform every step in the checklist if you want to effectively troubleshoot your problem. 1.Did you...forums.tomshardware.com
Is the display connected to the graphics card output and not the motherboard output?
-Wolf sends
Go through the checklist I provided, don't skip steps.I also got a new motherboard B365
Go through the checklist I provided, don't skip steps.
Glad it worked for you!RAM Wasn't sitting in the right place
Thanks!!!