Hardware Blue screen at boot

[ValouIka]

Hello!

I think I need your help. Two months ago, my Switch slipped out of my hands, and hit the ground. That was totally the gravity fault. I was playing Hollow Knight, and the game froze. Not a big deal, I just rebooted the console. However, after a bit of time, the console froze again. And the other times too. At some point, the console seemed to do something weird: a white halo appeared on the screen, like shown on the picture below. Finally, when I boot the console, I only get a nice and shiny blue screen (even when I charge the battery).
I disassembled the console to see whether something was loosen or broken, I saw nothing unusual then I reassembled it, but I'm still getting that blue screen with the bluest blue you've ever seen.

Thanks for your help.

For the pictures:
https://www.zupimages.net/up/21/35/k3zb.jpg (the white halo)
https://zupimages.net/up/21/35/cnkx.jpg (the blue screen)

 

[linuxares]

Can you enter RCM or Normal Recovery mode? Or bluescreen straight away?

 

[ValouIka]

Can you enter RCM or Normal Recovery mode? Or bluescreen straight away?

Bluescreen straight away (by pressing Power+Volup+voldown)

 

[linuxares]

Bluescreen straight away (by pressing Power+Volup+voldown)

I would try to disconnect the NAND drive and see if it can enter RCM, or if it bluescreen there as well. I'm afraid the most likely and only solution is reballing. Because the white halo looks like shotty graphic card. So when it gets warmer it disappear because the solder probably gets a better connection.

 

[Hayato213]

The first picture has to do with you dropping it, look like some pressure spot on the center of the screen, the second picture probably has to do with your tearing it down, maybe you damaged the emmc module, or got thermal paste on other components where you shouldn't

 

[ValouIka]

The first picture has to do with you dropping it, look like some pressure spot on the center of the screen, the second picture probably has to do with your tearing it down, maybe you damaged the emmc module, or got thermal paste on other components where you shouldn't

The white halo appeared some time after I dropped it, not immediatly. The second one was taken before I tear it down.

 

[linuxares]

The first picture has to do with you dropping it, look like some pressure spot on the center of the screen, the second picture probably has to do with your tearing it down, maybe you damaged the emmc module, or got thermal paste on other components where you shouldn't

White halos when I googled seem to be something hardware related. Not pressure.

 

[ValouIka]

The console seems to boot when I put it in a certain position, then it freezes again. So yeah, that's not something I can repair on my own

Thanks for your help!

 

[de9ed]

Solder ball under apu or ram is broken.

 

[lpoolm]

As mentioned will need a reball, you could try a reflow first though, heating the chip with a hot air gun to melt the solder balls hopefully reflowing them.
Might be worth trying to open it up, press the cpu and see if it boots then you will know.
The coder on YouTube has done a video recently on this, he fixed the one he was working on. I've tried a few but it's never fixed for me.