Yes, as BBW said, this is missing an instruction to release the ZIF connector left of the top screw. The latch needs to be flipped up on the lower side of the plug.
As others have mentioned, the topmost red connector HAS A CLAMP that you need to flip up. It seems like the creator of this guide has a 3ds with older board revision. With multiple people already having brought up the issue, the creator should absolutely update this guide to note the differences as others have already broken their devices due to this guide.
Media vez obtengan, podras ver un gráfico de la reputación que han obtenido con el tiempo.
Aquí está una vista previa de cómo lucirá el gráfico:
Aún no has no adquirido reputación.