中文
含义
散热风扇停转故障。电视内部冷却风扇未旋转，导致主芯片和电源模块温度升高，电视可能在连续使用30分钟后自动关机保护或画面出现噪点。
常见原因
- 风扇电机轴承卡死，因长期积灰或润滑油干涸
- 风扇供电插座接触不良或供电线路开路
- 风扇驱动MOS管击穿或开路导致风扇无供电
- 主板上风扇转速检测（FG信号）电路异常，虽然风扇转但主板误判
- 风扇控制电路PWM信号丢失导致风扇始终处于停止状态
自助排查
- 开机后贴近电视散热栅格听是否有风扇运转声，或用纸条测试出风口风量
- 若风扇不转，断电开盖检查风扇插头是否松动
- 用手拨动风扇叶片检查是否转动顺畅——卡涩感说明轴承缺油或磨损
- 风扇可单独更换，注意选购同电压（通常12V）同尺寸规格的风扇
English
Meaning
Cooling fan stopped rotation. The internal cooling fan has failed to spin, causing the main SoC and power module temperatures to rise. The TV may auto-shutdown after 30 minutes of continuous use or show picture noise due to overheating.
Common Causes
- Fan motor bearing seized from accumulated dust or dried-out lubricant
- Loose or disconnected fan power header on the main board
- Failed fan drive MOSFET (shorted or open) cutting power to the fan
- Fan rotation speed feedback (FG) signal circuit fault causing false stall detection
- Missing PWM control signal from the main board leaving the fan permanently stopped
Self-Check Steps
- Listen near the ventilation grille after power-on for fan noise, or hold a tissue near the vent to feel airflow
- If the fan is silent, power off, open the rear cover, and check that the fan connector is fully seated
- Give the fan blade a gentle spin by hand — rough or sticking motion indicates bearing wear
- The fan can be replaced individually; order a replacement with matching voltage (typically 12V) and dimensions