A1932 - Black screen, no startup sounds - but I think it turns on?

So we got this Air - Late 2018 A1932. Which I think turns on, the fans are sometimes spinning, and/or the logic board gets a bit warm, so I think there's some kind of activity at least.

Here is what we know so far :

• Black screen
• External screen not working (tried with USB C adapter with HDMI port)
• No startup sound
• Tried disabling some of the connections like battery, speakers, audio jack board etc - no luck
• Different charger - no luck
• No visible fluid damage

I don’t have much experience in these “newer” MacBooks, so could anyone suggest what I can test next? I dont have the skills to do “component” testing.

But any guidance or suggestions would be awesome!