Permanent damage to the lithium-ion cells.
When this mode is triggered improperly—due to software corruption or hardware failure—the chipset can "cycle" or draw excessive power, leading to the device becoming physically to the touch. Common Causes for Overheating in This State
If you have connected your Samsung Galaxy or Exynos-powered device to a computer and noticed an error labeled "Exynos USB Device 4000" accompanied by significant overheating , you aren't alone. This specific error often appears in Windows Device Manager when a phone enters a low-level boot state, and the resulting heat can be alarming. exynos usb device4000 hot
If the phone stays stuck in this mode, you may need to re-install the system software. Put the device into manually.
The issue is usually a cry for help from your phone's hardware. While it often points to a software glitch that can be fixed with a force restart or a firmware flash, extreme heat should always be treated as a hardware warning. If the phone remains hot and won't turn on after these steps, the motherboard may require professional repair. Permanent damage to the lithium-ion cells
Note: This usually requires technical knowledge and may wipe your data. Final Thoughts
Faulty Samsung USB Drivers on your PC can cause an unstable connection, leading to a power-draw loop that heats the device. Risks of Ignoring the Heat This specific error often appears in Windows Device
Use the on a PC to flash the official firmware (Stock ROM).
On older Exynos models, this error is sometimes a precursor to hardware failure where the power management IC (PMIC) malfunctions.
Press and hold the and Power buttons simultaneously for at least 15–20 seconds.