宽带故障代码678:光猫灯正常?三步自救指南,解决宽带故障代码678,光猫灯亮,三步自救攻略
Broadband fault code 678: Is the optical modem light normal? Three-step self-rescue guide, solving broadband fault code 678, Optical modem light on, three-step self-rescue strategy
以上为机器翻译结果，长、整句建议使用 人工翻译 。