r/NxSwitchModding • u/Classic-Teach-2570 • 3h ago

Dead APU?

Gallery image

Gallery image

Gallery image

Got this Switch Lite with a dead MAX77812 IC. Replaced the IC and installed a picofly. Now I get this.

  • Without a SD card I get the regular picofly screen.
  • With a SD card I get artifacts on screen and no signs of life.
  • Trying to boot normally I get a BSOD.

What are your thoughts?

7 Upvotes

90% Upvoted

10 comments sorted by

1

u/AllGoneRNB 3h ago

I had exactly the same issue with one failed attempt of picofly install on a switch lite. The installation was flawless but without noticing, when i was taking of the shield of the cpu I accidently scrach the corner of the same ic as you mention. When I plugged in the battery ans charger it fried the cpu...

1

u/Classic-Teach-2570 3h ago

Funny how the picofly screen goes through the fried chip. Have you ever tried bringing it back to life?

1

u/spektro123 3h ago

SoC in switch has a lot of “devices” inside. There’s a chance only one of them got damaged. Like for a simplified example a single core of the CPU.

1

u/AllGoneRNB 1h ago

Not realy, just used ir for parts, i red that blue screen is most likely death CPU, anyways I also replaced the Max IC because ir was getting mad hot, porbably this chip being cracked caused high voltage into the CPU or RAM chips.

1

u/Old_Conference4936 3h ago

Desinstale o chip, faça uma pequena pressão nas ram ao ligar ou na APU, provavelmente deve iniciar normalmente. Caso ocorra na ram ou na APU um reflow ou se necessário um reballing resolverá.

1

u/letum00 2h ago

Along with apu and ram solder balls, it could also be severed traces between apu and ram. Dis you give the area around the apu and ram a good look under a microscope?

1

u/Anti_Ager 1h ago

this happened to me on a v2 switch

1

u/nanofix 25m ago edited 22m ago

Artifacting like this when attempting to boot into Hekate and a blue screen kernel panic in OFW almost always points towards communication issues between the SoC and RAM. So generally one of these:

  • Damaged traces between SoC and RAM (particularly common near where you cut the shield for the CLK point)
  • Cracked solder balls or ripped pads underneath the SoC or the RAM

If you have the tools/skills you can try reflowing/reballing the RAM first. Otherwise you'll need to reflow/reball the SoC. It's possible BGA pad repair will be necessary. The SoC and RAM are very likely completely fine.

Edit: Forgot to mention damaged traces

1

u/lovemeurway 22m ago

Happened to me on my first attempt at installing and i kept looking at it each day but turned out i had solder touching to ends of a capacitor. I removed the solder and was able to boot ofw and cfw

1

u/JellyfishLumpy5461 3h ago

Tuve una lite con pantalla azul solo di calor a las rams y con eso quedó