Direct answer
Reusing an SSID/password can reconnect many devices, but changed security, band steering, DHCP or cached network parameters can block others.
What this covers
- The observed symptom matches this record
- Customer-accessible settings, connections and external components
- Diagnosis before reset, deletion or component replacement
What it does not cover
- ×A model-specific error code with a different documented meaning
- ×Internal electrical, battery-cell, gas, refrigeration or sealed-component repair
- ×A guarantee that every model exposes the same control label
Capture the exact symptom
ReversibleIdentify affected device age and whether the new router uses WPA3-only, 5 GHz-only or a different subnet.
Run the smallest isolation test
ReversibleUse WPA2/WPA3 transition mode if supported, expose 2.4 GHz for setup and forget/rejoin one failed device.
Correct only the proven cause
ReversibleKeep modern security while creating the narrow compatible IoT network required for older hardware.
Verify before changing anything else
ReversibleRestart and reconnect representative phone, computer, printer and smart device.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check before resetting anything?+
Identify affected device age and whether the new router uses WPA3-only, 5 GHz-only or a different subnet.
What is the safest isolation test?+
Use WPA2/WPA3 transition mode if supported, expose 2.4 GHz for setup and forget/rejoin one failed device.
When should I stop troubleshooting?+
Do not use open or obsolete WEP security to support an old device.
Answer for the exact device and software version shown above.