When the device is working normally you can see the green light flashing in sync with your heart rate. If you suspect that the device is not working normally:
- Check if the green light is visible in a darker location. The light is quite dim in daylight so please check away from direct light. The green light is particularly dim during "night mode", the default setting is between 10 p.m. and 6 a.m.
- Check the fastening of the electrodes and the device. Are the electrodes in the correct places and well attached to the skin? And is the device on the correct side of your body (see the instructions: Attaching device and electrodes)?
If the green light is still not flashing normally, here are few other causes and solutions:
Device stopped flashing during exercise
Intense sweating (for example while exercising) may loosen the electrode contact as well as heat up and moisten the device. This may cause the device to lose the heart rate signal and to stop flashing. Before continuing the measurement please clean and dry the device and skin. If needed, detach the cable of the device, dry the USB connector for 30 minutes and reattach the cable. Also change to new electrodes.
Device does not turn on after shower
Your skin may still be wet after a shower so the electrodes may not get proper contact right away and the device may not be able to find the heart rate signal. It is also possible use of moisturizing cream prevents the proper electrode contact. Before attaching the device and electrodes, dry the skin carefully and wait until the moisturizing cream has absorbed. Also change to new electrodes. If the green light of the device does not start flashing right away, make sure it is attached and check the situation again after half an hour.
Charge the device battery
See here instructions for charging the battery.
If the device still does not turn on, please contact Firstbeat Support, or fill in the faulty device report.