A logic board can hardly be damaged from a drop. Your point is baseless. A display can be damaged indeed, but in this case the issue is quite visible and the unit wont be refurbished without a new display.
A logic board is usually damaged by corrosion or electromigration, a process that occurs over the time.
Sounds like you’re completely unfamiliar with how damage can occur.
Most of the components on the logic board are secured only by solder. This is vulnerable to physical shock. A drop can induce significant shear stress, potentially ripping solder pads from the PCB. This isn't a simple pass-fail scenario. Weakened connections can lead to intermittent issues. Depending on the affected pads, symptoms can range from Wi-Fi and audio disruptions to touch screen problems.
An iPhone 13 Pro Max dropped to the ground without screen damage. You probably think is ok but you don't know what happened inside the motherboard.
How to Fix iPhone 12 Pro Max Wi-Fi Issues After Drop Damage: Step-by-Step Guide
Learn how to repair an iPhone 12 Pro Max Wi-Fi issues caused by drop damage. This guide covers step-by-step troubleshooting, chip inspection, and fixing missing pads for a working Wi-Fi module.
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