今天突然无法上网了，插上网线显示已连接网络但无法上网，后边的网络灯不亮，有啥解决方法吗？
xxx@xxx-PC:~/Desktop$ ifconfig -a
enp1s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.1.78 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::1ee9:7014:ad28:532 prefixlen 64 scopeid 0x20<link>
ether e8:6a:64:7d:76:62 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 2015 bytes 168735 (164.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2015 bytes 168735 (164.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

谁知道咋解决啊？

这明显网卡还在啊。。。估计路由器的问题吧，或者宽带欠费了？