iPhone 14 Pro Stuck in Apple Logo Boot Loop

A 3-second Apple logo boot loop on an iPhone 14 Pro that eventually drops into recovery mode is very unlikely to be caused by the proximity sensor—that component is only initialized later in the boot process and normally wouldn’t prevent iOS from loading. Given that the phone powered off while idle and now fails to boot even after a data-preserving restore and Fix Flash, the symptoms point more strongly to a hardware fault, most commonly the power management IC, logic board instability, storage (NAND) errors, or a failing battery or battery data line. A repeating short boot cycle often indicates the phone is failing hardware checks during early boot and restarting as a safety response. Unfortunately, if recovery-mode restores that preserve data cannot complete, software is largely ruled out, and factory reset would be the last software test—but if that also fails, professional board-level diagnosis is required. If your data is critical, take it to a reputable microsoldering repair shop that offers data-preservation repairs, and avoid further flashing attempts to reduce the risk of permanent data loss.