试着拔掉调制解调器15秒。 尝试重启调制解调器和路由器。 试着换掉以太网电缆和同轴电缆。 确认你所在的区域是否有任何断电。 确认调制解调器是否与路由器兼容。 检查调制解调器是否需要特殊配置。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
If you are suddenly unable to connect to the Internet, unplug it for a few seconds and plug it back in. This allows the modem to fully power down and initialize a fresh, stronger connection. After 15 seconds, reconnect the modem and wait at least two minutes before connecting to the Internet. If you experience problems connecting to the Internet, try powering down your entire network and restarting each device. This can help refresh both devices and ensure a stronger, lasting Internet connection