Troubleshooting Bluetooth USB Adapters (2023)

1. Checkdevice administratorIf bluetooth is installed correctly.

2.check settingsBluetoothicon in the taskbar.

For Win10, openmechanism->equipment->Bluetooth and other devices ->More Bluetooth options, mark..."Show bluetooth icon in taskbar”。

Win7/8.1 please opencontrol Panel->hardware and sound>Devices and Printers ->Change Bluetooth settings, mark..."Show bluetooth icon in taskbar”。

3.If you still don't get help, check out the Bluetooth support service.

press naWin test + R test, type "usluge.msc", on the listBluetooth support serviceand double-click it. Make sure the service is set toautomatic(trigger start) I started.

(1) Petitione Check if the device is displayed normallydevice administrator.

(2) Try plugging the Bluetooth USB adapter into another USB port and another computer. If it still doesn't work, restart your computer and check again.

(3) Check that there are no other Bluetooth devices on the computer. Disable all existing ones, if any. Built-in bluetooth devicedevice administrator, plug in the adapter and try again.

(4) If the driver can be installed successfully, but the Bluetooth icon is not displayed, please checkP1.

Disable the Bluetooth adapter that came with the computer, and then reinstall the Bluetooth USB adapter.

1. UB400/UB4A: Support plug and play on Windows 10 PC. If not, download the driver fromOfficial websiteAnd install it manually.

UB500: Femaleor Windows 10/8.1 system, the driver installation will start automatically when you connect to the Internet. unless,Download drivers fromOfficial websiteAnd install it manually.

2. If your computer has a built-in Bluetooth function, please turn off the built-in Bluetooth adapter before using the UB series device. (Open Device Manager and right-click your computer's built-in Bluetooth adapter, then click Disable Device.

3. In order to use UB400/UB4A/UB500 normally, all Bluetooth drivers or third-party software must be uninstalled.

Please follow the installation instructions below:How to install the Bluetooth Nano USB Adapter?

1)Use another USB port or use a USB extension cable

Move the adapter to the front of the computer instead of the back of the computerOr use a USB 2.0 extension cable to move the adapter away from the computer.Because processors and system components generate a lot of random radio noise, causing short range and clipping issues.

Intel's white paper confirms that poorly shielded USB 3.0 ports can cause radio interference. If your device is having range issues when connected to a USB 3.0 port, a USB extension cable can help.

2)Make sure the bluetooth receiver has a good signal

Bluetooth range depends on receiving and sending devices. Check the receiving Bluetooth device with your mobile phone to confirm that the range is within the acceptable range.

3)Eliminate possible distractions

Range may be affected by physical obstructions (walls, people, etc.) and wireless interference (Wi-Fi routers, wireless TV adapters, etc.).

4)Check if the network speed is normal

If you're watching video or streaming music from an online source, check to see if the audio loss issue isn't caused by low network speeds.

Make sure your computer has Bluetooth turned on. Follow these steps: right click on itBluetooth pictogramon computer >open settings>More Bluetooth options.make sure it isAllow Bluetooth devices to find this computerSelected. This is disabled by default. Only after this item is checked, the mobile phone can find the computer.

NOTE: The process is similar for other Windows operating systems.

1. Make sure your Bluetooth device is set to be visible.

2. Restart the Bluetooth device and computer.

3. Unplug and replug the Bluetooth USB adapter. or disable itdevice administratorand turn it on again.

4. Try to install the driver manually again.

Please follow the installation instructions below:How to install the Bluetooth Nano USB Adapter?

5. After pairing, the device cannot be scanned again unless the device is removed. Therefore, before rescanning, try the following steps on your computer:

gocontrol Panel>hardware and sound>Devices and PrintersYou will then find the device previously connected to the bluetooth usb adapter inequipmentPage. Right click on the device and selectdelete device.Then try scanning for the Bluetooth USB adapter again and you should be able to find the device.

6. For devices with non-standard Bluetooth protocols, there may be compatibility issues. suggestionP7Check out the compatibility list.

(1) Check if your device has Bluetooth function.

(2) The following compatibility list is based on TP-Link laboratory environment. Many more models are supported than listed.

Note: There may be compatibility issues with devices using non-standard Bluetooth protocols.

P=Pass, F=Fail

UB500：

UB400&UB4A：

1)Reset default playback device.

1. Right clicksound iconClick on the taskbarsound.When the sound window opens, click thegameLabel.

2. Then you will see a list of audio devices, click the Bluetooth device. then pressdefault settingand save the changes, then click Apply and OK.

2)Adjust volume.

1. Go to taskbar and right click on itsoundicon, select itsound.

2. When the sound window appears, go togametab and right click on the bluetooth devicefeature.

3. Click nagradecard, drag it all the way to the right. Click Apply and OK.

3)Remove and fix the bluetooth device.

1. Go tomechanismi clickBluetooth.

2. Remove the Bluetooth device and reconnect it.

method one:

1) live togethercontrol Panel>Devices and Printers.

2) Find your bluetooth device, continue if you see an orange warning. If not, you can continue with Method 2.

3) Right click on your device and selecttroubleshooting. Windows will try to solve your problem.

Method Two:

1) live togethercontrol Panel>Devices and Printers.

2) Find your headset/audio device.

3) Right click on your device and go tofeature.

4) live togetherServecard and cancelHandsfree.

5) touchAll right, and restart the machine.

For Windows 7 users:

gocontrol Panel>hardware and sound>Audio Device Management> right clickBluetooth audio playback;live togetheradvancedCards and SuitsDVD quality.

Method three:

Try using a different USB port for the device. Also try connecting the USB device to another laptop for testing. (Note: If your computer has built-in Bluetooth, you must disable the original Bluetooth function.)

Method four:

Try disconnecting another bluetooth device.

Remove the Bluetooth headset from the device. (Right-clickBluetoothicon in the lower right corner of the desktop, then chooseshow bluetooth devices.then insoundsection, you will find that the headset is connected. Please clickdelete device)

Then pair the headphones again and add them as devices. Sometimes you need to do this a few times before the sound starts to flow smoothly for music and streaming video.

If the adapter is installed inWindows 10, try disabling the built-in microphone via bluetooth. Then try again.

1. It is recommended that the distance be within five meters. Try to get closer to the computer to see if the effect will be better.

2. Keep the Bluetooth adapter away from the Wi-Fi signal source, because the 2.4GHz Wi-Fi signal will affect the Bluetooth signal.

3. USB 3.0 introduces radio frequency interference in the 2.4 GHz to 2.5 GHz range, the same radio spectrum used by Bluetooth and Wi-Fi. Therefore, it is not recommended to use USB 3.0 ports, nor to place Bluetooth adapters too close to routers or working USB 3.0 devices.

After UB400/UB4A is successfully installed, the computer can search for most Bluetooth devices. But if you want to pair your PC with a PS4TM controller, you need to install an extra appRemotePlayInstaller.exefrom Sony. For more details, see the FAQ below:

https://www.tp-link.com/support/faq/2743/