If the ADC-VDB770 is not ringing the indoor chime when triggered, use the following steps to troubleshoot the behavior.

Verify the original chime and doorbell button function properly

Reconnect the original doorbell to the chime to test.

Verify the LED does not double-blink blue after pressing the button

Press the doorbell button. If the LED double-blinks blue, see What does the double-blinking blue LED on the ADC-VDB770 mean?.

Verify the installation meets the power and wiring requirements

Power requirements

*Important: The power module included with the ADC-VDB770 is required for every installation. For more information about the power module, see Power module for the ADC-VDB770 - User Guide.

Wiring the power module

• Verify the power module's gray wires are connected to the transformer and the ADC-VDB770. No polarity.
• Verify the power module's white wires are connected to the chime's Front/Rear and Trans terminals (or to a 10 Watt 10 Ohm resistor if there is no chime). Typically no polarity.
  • For digital chimes, if the indoor chime stops functioning properly after attaching the white wires, reverse the polarity of the wires and test again.
• When installing the power module, verify the chime's functionality is unobstructed (e.g., do not attach the power module to a mechanical chime between the striker plate and plunger).

For more details about wiring, see Wire the ADC-VDB770 to a chime or Wire the ADC-VDB770 without a chime.

Verify the correct Chime Type is selected

To configure Chime Type using the Customer Website:

1. Log into the Customer Website.
2. Click Video.
3. Click Settings.
4. Using the Video Device dropdown menu, select the desired video device.
5. Click Video Device Info.
6. Using the Chime Type dropdown menu, select the appropriate chime type. For more information about identifying what type of chime the ADC-VDB770 is connected to, see What types of chimes are compatible with the ADC-VDB770?.
7. Click Save.

To configure Chime Type using the Customer app:

1. Log into the Customer app.
2. Tap .
3. Tap Doorbell Camera.
4. Tap .
5. Using the Chime Type dropdown menu, select the appropriate chime type. For more information about identifying what type of chime the ADC-VDB770 is connected to, see What types of chimes are compatible with the ADC-VDB770?.
6. Tap .

Verify Indoor Chime is enabled

To enable Indoor Chime using the Customer Website:

1. Log into the Customer Website.
2. Click Video.
3. Click Settings.
4. Using the Video Device dropdown menu, select the desired video device.
5. Click Video Device Info.
6. Click to select Indoor Chime.
7. Click Save.

To enable Indoor Chime using the Customer app:

1. Log into the Customer app.
2. Tap .
3. Tap Doorbell.
4. Tap .
5. If there are more than one doorbell camera, tap the desired device.
6. Tap the Indoor Chime toggle switch to enable the indoor chime.
7. Tap .

Reboot the ADC-VDB770

1. Press and hold  for 60-75 seconds until the LED starts flashing yellow then release.
2. Wait for the device to reboot.

Factory reset the ADC-VDB770

1. Press and hold  for 75 seconds until the LED starts flashing red and green then release.
2. Wait for the device to reboot.
3. Re-enroll the device. For more information about enrolling the ADC-VDB770, see Alarm.com Video Doorbell (ADC-VDB770) - Installation Guide.