Most frequent drops come from a weak backhaul link or interference, not from a faulty extender. If the EX7700 is too far from the router, or sits behind thick walls and heavy appliances, the backhaul band can fluctuate and cause random disconnects even when your device shows full bars.
- Interference killers to avoid: Microwaves, baby monitors, cordless phones, large mirrors, metal filing cabinets, fridges, and thick concrete or brick walls.
Start by moving the EX7700 a bit closer to the router and away from these interference sources, then test again. If repositioning doesn’t work, your next step is to log into your router and try changing the 5 GHz WiFi channel to one with less overlap from neighboring networks, then reboot both router and extender.