Linksys 1900ACS Problem after Update

Hello,

i had my Linksys 1900ACS with OpenWrt (15?) down for some time. I just updated it via the web interface with

openwrt-19.07.4-mvebu-cortexa9-linksys_wrt1900acs-squashfs-factory

I assume that the update was a reset of my settings, which was intended because they were not up to date anymore.
But now I can't connect via LAN anymore.
Under macOS I can't get DHCP and under 192.168.1.1 or the "old" IP I can't connect. But the LED on the connected router port is blinking.

Thanks for the help!

Flora

Your router has dual firmware. When you upgrade, you are in reality writing to the other block. Booting from one to the other is not difficult and can save you in such cases that upgrade doesn't go as planned.