Internet werkt niet meer en V10a brandt rood

Sorry voor Engels, but my Nederlandse is bad.

Today I woke up and discovered that my internet stopped working.

The blue light on an Experia Box v10A comes for a few seconds and then goes to constant red light.

Router configuration:

Model Name:    VRV9517
Firmware Version:    v5.00.58 build505-owl
Boot Code Version:    1.0.38-161.188
Hardware Version:    R01
 

In router system logs I see these lines:

Jan  1 00:00:27 VRV9517 syslog.info syslogd started: BusyBox
Jan  1 00:00:29 VRV9517 daemon.info dhcpd: Wrote 0 leases to leases file.
Jan  1 00:00:33 VRV9517 daemon.info dnsmasq[3670]: started, cache disabled
Jan  1 00:00:33 VRV9517 daemon.info dnsmasq[3670]: compile time options: IPv6 GNU-getopt no-DBus no-UBus no-i18n no-IDN DHCP no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-cryptohash no-DNSSEC no-ID loop-detect inotify dumpfile
Jan  1 00:00:33 VRV9517 daemon.info dnsmasq[3670]: read /etc/hosts - 6 addresses
Jan  1 00:00:49 VRV9517 daemon.crit dnsmasq[4281]: failed to create listening socket for port 53: Address already in use
Jan  1 00:00:49 VRV9517 daemon.crit dnsmasq[4281]: FAILED to start up

I did reboot the box, but it didn’t help. Then did reset the box, but it didn’t help either.

Does anyone knows how to solve this issue?