WLan-WW dongle shows no LED at all. Either not receiving power from inverter or not seated correctly.
Common causes
Collar screw not tightened after insertionDongle not fully inserted into inverter WIFI/4G/USB portInverter communications port faulty
What to check
STEP 1
Unscrew and remove the dongle. Re-insert fully — triangle logo must face front of inverter. Tighten collar screw clockwise until snug (do not overtighten)
STEP 2
Check if the dongle shows any LED when briefly powered by a 5V USB power bank — if it lights up externally, the inverter port may be faulty
Escalate if
Dongle lights up when externally powered but not in inverter port — inverter USB port fault, escalate
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