If nothing happens when you plug in your Blood Pressure Monitor, perform the following steps:

1. Make sure the Withings Web App is installed on your mobile device.
2. Make sure your mobile device is unlocked.
3. Make sure the batteries are not empty.
4. Make sure you have followed the polarity marking when inserting the batteries.
5. If you're running iOS 8 or higher, make sure you close the Withings Web App before plugging in your Blood Pressure Monitor.

If you still encounter issues, reach out to Customer Service by clicking the Contact us button at the bottom of the page.