If the App detects the notes you play but the piano’s lighted keys do not respond, do not repeat the entire Bluetooth setup immediately. First confirm that the selected lesson or song actually uses light guidance, then restart that activity, check the current light or hand settings, and compare several keys. If the App does not detect notes at all, solve the connection failure first.
Identify the failure pattern
- No note detection and no lights: connection path first.
- Notes detected but no lights in one activity: content or mode first.
- Lights work in one lesson but not another: activity support or settings.
- Only one key or color fails repeatedly: document a possible hardware-specific issue.
Is this a connection problem or a light problem?
Open a supported interactive activity and play several notes. If the on-screen activity reacts correctly, the App is receiving performance data and the issue is narrower than complete non-detection. If nothing on screen reacts, return to the App-detection diagnostic rather than changing light settings.
Confirm that the activity uses light guidance
The official App page describes guided lessons and songs that use illuminated keys, but this does not establish that every screen, song or playback mode sends light instructions. Start with a feature explicitly presented as light-guided. Exit and reopen the activity so an interrupted session is not mistaken for a hardware fault.
Check the lesson state and guidance settings
Look for visible controls related to left hand, right hand, both hands, guided play or light assistance. Use only controls shown in the current App; names can change between versions. If one hand is disabled, the corresponding lights may be absent by design.
Reduce the test to a short passage. Begin from the start of the exercise, wait for any count-in and compare what the screen requests with the keys that illuminate.
Compare several keys and activities
| Pattern | More likely explanation | Next check |
|---|---|---|
| No lights anywhere, but notes register | Activity, guidance setting or App state | Try a documented light-guided lesson after restarting the activity |
| Lights work in lessons but not ordinary keyboard play | Expected mode behavior | Confirm whether free play is supposed to illuminate keys |
| One key never lights when requested | Key-specific LED or data issue | Record the same key failing in more than one supported activity |
| Wrong group of keys lights | Mode, transpose or mapping issue | Return documented transpose/mode controls to their normal state |
Restart without using an undocumented reset
Close the activity and App, turn the piano off, restart both and reconnect through the normal method. Do not use a factory reset sequence copied from another model. If a model-specific reset is appropriate, obtain it from the current manual or The ONE support.
What evidence should you send to support?
Record a short video showing the App requesting a note, the physical key and the light response. Include the model, serial number, App/OS version, activity name, guidance settings and whether note detection works. This is more diagnostic than saying only that “the lights are broken.”
Frequently asked questions
Do the lights operate in every App screen?
Do not assume so. Test a lesson or song explicitly designed for light guidance.
Why do only left- or right-hand lights appear?
The selected hand or lesson stage may intentionally limit guidance. Check the visible activity settings.
Should you open the piano to inspect an LED?
No. Document the repeatable failure and use official support or authorized service guidance.
