2020 MacBook Pro Won't Boot - Suggestions?

[Cookie18]

I have a 2020 13" Intel MacBook Pro that won't boot up. I bought this last year to work on but haven't had much time. When I bought it, the seller said that it would turn on, but there was no picture on the display. I figured it was probably just a dead display and so I switched it out. However, it then refused to turn on at all. I put it down and came back to it today.

Now, it still has the new display connected, I've been charging it for a while, and the only thing that happens when I turn it on is that the fan spins up (at least that's a good sign since it must have been so dead that wasn't even happening initially).

I've tried all of the typical key combinations for turning on a MacBook, resetting PRAM, etc. I've tried putting it into DFU mode in Apple configurator, but it doesn't appear in the configurator on the host MacBook Pro. I also replaced the ribbon cables that connect the battery to the logic board. It looks pristine inside, so I don't think there's any physical damage.

Any ideas? Things I haven't tried or other ways to try and get it turned on past solely the fan spinning up?

 

[BanditoB]

It sounds like you've done about everything that you can.

You mention changing the display. Was that the internal display or an external display? You could always attach an external display and see if anything comes up on that one. Another check that you can perform is to shine a bright flashlight on the screen to see if you can see an image. It could just be that the backlight isn't coming on.

If all of that fails, your next step would be to take it to an Apple Genius and let them diagnose the problem. It doesn't cost anything and they'll let you know what needs to be done.

 

[jav6454]

Take it to Apple at this point.