Using a nano router, which only has a status light, an ethernet port and a reset button. This was bought in 2013. We used it for a few years, then didn't need it. Just got it out and tried to use it.

The immediate problem is that I cannot get to the admin page on the LAN, let alone the internet.

The light turns on and my laptop can see a wifi router with the default name  "TP-LINK_COC590" and connect to it. However, I do not get an IP. Using an Android phone, I can choose it but it then says "Obtaining internet address" for a few minutes till it gives up. Connecting to my laptop by ethernet same result: No IP. I tried opening the web interface anyway, 192.168.1.253, per the label, also 192.168.1.0 and 192.168.1.1 but of course none could connect.

Pushed the reset and powered on and off several times, no change.

Any suggestions?