The coil does not switch on, unlike the remote control and the headphones:

[FORUM XP]

1/ You have a different coil selected in the menu OPTION – COIL…
- Select the corresponding coil.

2/ The serial number of the coil that you had entered in the remote control was incorrect or was changed inadvertently.
- Check the coil’s serial number (see Option – Coil …).

3/ The coil battery is drained.
- Recharge it.

4/ The coil battery has reached the end of its lifespan.
- Contact your reseller or XP.

5/ The coil is defective.
- Contact your retailer or XP.