Settings check first, then power cycle. IP you can turn off in comport setup and clear out in modem setting ip settings and then switch it back on after going out and back into engineering (I do first, then power cycle last). Then tech support, but finding in many different scenarios tech support isn’t what it used to be across many different manufacturers.
had a fall out with Hikvision over support and attitude recently, we no longer offer there products to new customers. Two wasted sites visits and had to fight to get any support because it was EZVIZ on hik connect, which they no longer offer cross support on.
Took back to the office, couldn’t get it to work still, down powered it over night and bing bang Bosch got it all working, trip back to site on a Sunday and moments later all up and running.
The power of, off and on. When I advised them of the what worked there reply was even more shocking.
I suspect that was some kind of settings messed up by the customer and locked into the devices involved and the long power down facilitated recovery as new devices, but no such recommendations offered by support, I didn’t get firmware file updates but they did nothing. very expensive for us.