Question PC power's up but monitor has no signal

[BaellonChor]

I have built a PC with a:
ASUS Prime B365M-A motherboard
Intel CORE i5-9400F LGA 1151 (9th Gen)
Corsiar Vengance 8GB DDR4 2666Mhz
Thermaltake LITEPOWER 650w PSU
This is in a Cougar Gemini Micro ATX case.

I am currently breadboarding this build (on the MoBo box) and it is connected to a BenQ 27" monitor via HDMI. I have connected it via a second HDMI cable, tried a Philips monitor, as well as connecting the BenQ via RGA connector.

I have followed each of the steps in:

How To - "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

I have also tested the power supply as per:
https://www.lifewire.com/how-to-test-the-power-supply-in-computer-2626129
with a multimeter and the PSU checks out ( i checked the 24 pin and 8pin connectors - the only ones being used at the moment).

I have also reset the BIOS as well. If anyone has any ideas on where to look next or which part could be at fault I would appreciate the help. This is my first build from scratch (have swapped out parts before).

 

[bioax]

I don't see you have a graphics card, and the 9400F doesn't have integrated graphics.

 

[BaellonChor]

Thanks Drivinfast247. We tried with a ASUS Gefore 1050Ti but got the same result (the the HDMI plugged in to the GPU) but none of the fans were spinning on the GPU. Tried both power connectors that support GPU and neither powered up. That was in the case and did not try it in the breadboard. I will give it a try tonight and see how that goes.