Unable to control the set-top box or A/V receiver when using the IR Blaster function.

If you are unable to control the set-top box or A/V receiver when using the IR Blaster function, do the following:

IMPORTANT: Any of these steps may resolve the issue. Check if you can control your devices using the IR Blaster function after completing each step.

NOTE: If you failed to perform AV receiver control setup on 2016 Android TV models, please refer to the following FAQ.
Failed to perform AV receiver control setup.

• You cannot turn on/off the power of the set-top box using the remote of the TV. When you use the IR Blaster feature, perform the following operation.

1. 1. Select the set-top box (STB) with the INPUT button.
   2. Press the ACTION MENU button.
   3. Select Menu.
   4. Select Power(STB).
2. Make sure that the connected set-top box or A/V receiver supports the IR Blaster function.

   NOTE: Contact the device manufacturer to confirm its compatibility with the IR Blaster function.

3. Make sure that the TV and the set-top box or A/V receiver are turned on.
4. Temporarily disconnect the USB cord for the IR Blaster, and then securely reconnect it to the TV's USB port.
5. Make sure that the IR blaster is positioned properly in front of the IR sensor on the set-top box or A/V receiver.

   NOTE: Refer to the instruction manual or contact the device manufacturer for information about the location of the IR sensor on the A/V receiver or set-top box.

6. Setup the IR Blaster by following the procedure below.
   1. Press the HOME button on the remote.
   2. Select Settings, then press the Enter button.
   3. Select External Inputs, then press the Enter button.

      NOTE: If using an Android TV, External Inputs is in the TV category.

   4. Select IR Blaster setup, then press the Enter button.
   5. Select Set-top box control setup or AV receiver control setup, then press the Enter button.
   6. Follow the on-screen instructions to complete the set-up.
7. It may take several tries before you are able to control your devices.
8. Try all the possible key tests on the remote control.

NOTES:

• A message will appear if the set-top box or A/V receiver is not supported when all of the keys on the remote control has been checked.
• The IR Blaster function does not support long press or holding down buttons such as the Vol+/- or CH+/- buttons. Press these buttons repeatedly.
• The REC(STB) key on the screen will not work for set-top boxes that do not have the recording function.
• If after selecting the name of the cable provider and the model number of the cable box do not work, you can manually enter the name of the cable provider and the model number of the cable box to control the cable box using the remote control of the TV.

If the steps above did not work, follow the steps below to manually enter the model number of the setup box.

1. Press the HOME button on the remote.
2. Select Settings.
3. Select External Inputs in the TV category. 

   NOTE: This only applies with Android TVs.

4. Select IR Blaster setup.
5. Select Supported Models.

   NOTE: Make sure the IR blaster is connected to the IR blaster port of the TV.

6. Enter the name of the cable or satellite provider.
7. Enter the model number of the setup box.
8. Enter your zip code.
9. Select the appropriate input where the setup box is connected to.
10. Once the setup is complete, make sure the TV is set to the right input being used. If it's not set to the right input, press the INPUT button.