中文
含义
USB过流保护触发。USB端口因外接设备电流过大而自动切断供电，无法识别USB设备。
常见原因
- 插入的USB设备功耗超出电视USB端口供电能力（通常为500mA）
- USB外接硬盘未使用独立供电——大容量硬盘启动瞬间电流过高
- USB端口内部金属触点短路或潮湿氧化
- USB延长线或HUB质量差导致线路短路
- 外接USB设备内部短路触发端口过流保护
自助排查
- 拔下所有USB外设，检查USB端口内是否有异物或金属碎屑
- 更换低功耗USB设备（如U盘）测试端口是否恢复
- 大容量移动硬盘应使用独立外接电源而非依赖电视USB供电
- 检查USB线缆是否破损或接头氧化
- 如所有设备均触发过流保护，可能是端口电路故障需维修
English
Meaning
USB overcurrent protection triggered. The USB port has been cut off due to excessive current draw from a connected peripheral.
Common Causes
- Connected USB device draws more power than the TV port can supply (typically 500mA)
- External hard drive without its own power supply — inrush current exceeds the port limit on spin-up
- Short circuit or corroded contacts inside the USB port socket
- Poor-quality USB extension cable or hub causing a short
- Internally shorted USB device triggering port-level overcurrent protection
Self-Check Steps
- Disconnect all USB devices and inspect the TV’s USB port for debris or bent pins
- Test with a low-power device (e.g., a standard USB flash drive) to see if the port recovers
- Use an externally powered hard drive enclosure instead of bus-powered for high-capacity drives
- Examine the USB cable for damage or corroded connectors
- If every device triggers overcurrent, the port circuitry may need repair