Hi, on the front of your Develo WIFI extender there are three buttons, one switches off WIFI have you pressed that and inadvertently switched the WIFI off? Have you tried plugging in a LAN cable to the extender box to see if it is able to connect through it that way? That way you would know it was working through the mains and that just the WIFI bit isn't working. Check the front buttons first though... .
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