The "hot" symptom typically manifests in two distinct scenarios, both fraught with peril. The first, and most literal, is a thermal anomaly during the flashing process. When a device is connected to a PC for a firmware flash, the Preloader initiates a high-power state to facilitate rapid data transfer to the NAND chip. However, if the flashing process is interrupted, or if the USB drivers conflict, the Preloader can become stuck in an initialization loop. In this state, the power management integrated circuit (PMIC) continues to supply voltage to the CPU and memory subsystems without the rhythmic rest cycles of a standard boot. The result is a rapid thermal buildup at the CPU and PMIC junctions. The technician feels the phone heat up rapidly, a tangible sign that energy is being dumped into the circuits without purpose—a "hot" preloader that threatens to desolder the Ball Grid Array (BGA) connections.
Fixing "hard-bricked" devices that don't show any signs of life. Auth Bypass: oppo realme mtk preloader hot