If you remember the IP address of the device, you can try logging in directly to the web interface on the device. If you do not remember the IP address, you can guess. For example, if you have a network with a 192.168.1.1 gateway address, you can try logging in from your browser, with addresses starting at 192.168.1.2 to 192.168.1.255. If you use DHCP, the address of your devices, it is probably at the beginning of the series.

TV room: 861v8, 800v4, UHD722,Front 2xDSP7200SE, DSP7200HCSE, Side DSP5200, Rear DSP33, DSW, Velodyne DD 15 Sub,
Roon Rock NUC, QNAP NAS, Chromecast Ultra, Apple TV, Cambridge Audio 752BD, Pro-ject Pre box S2 digital, Philips Pronto remotes, Supra LoRad Power.
Office: 800v3, MS200, DSP3100
Basement: MS600, 502, 557, Dynaudio 52se, Dynaudio Sub 250