If you are experiencing connectivity issues with your JBL One speaker, follow these steps to troubleshoot and resolve the problem:

1. Power Check
Ensure that your JBL One speaker is powered on. Also, make sure the device you are trying to connect (smartphone, tablet, etc.) is fully charged.

2. Bluetooth Settings
Go to the Bluetooth settings on your smartphone or tablet. If your JBL speaker is listed, try removing it from the paired devices. Then, attempt to establish a connection again.

3. Restart Devices
Restart both your source device (smartphone or tablet) and your JBL One speaker. To restart your JBL One, turn it off completely and then turn it back on. This can resolve many connectivity issues - learn more.

4. Set Host Speaker
If you are using multiple JBL speakers, ensure that one of them is set as the host. You can typically do this by pressing a button (often labeled 'X') to activate broadcast mode. The host speaker’s LED should turn green, indicating it's active - learn more.

5. Bluetooth Pairing
Try initiating Bluetooth pairing again. On your source device, go to the Bluetooth settings and look for your JBL One speaker. Tap on it to connect. If it fails to connect, ensure no other devices are trying to connect to your JBL speaker at the same time.

6. Firmware Update
Ensure that your JBL One speaker is updated with the latest firmware version. You can check for updates on the JBL website or through the JBL app - learn more.

7. Clear Bluetooth Cache (for Android devices)
If you're using an Android device, go to Settings > Apps > Bluetooth and clear the cache. This can sometimes improve connection stability.

8. Hard Reset
If all else fails, consider performing a hard reset on your JBL speakers. This can be done by holding down specific buttons (usually the volume up and power buttons) simultaneously until the speaker resets - learn more.

By following these steps, you should be able to resolve most connectivity issues with your JBL One speaker. If problems persist, consider reaching out to JBL customer support for further assistance.