First you should physically connect your firestick to the lg smart tv and the power source.
Connecting firestick to lg tv.
Or if your tv supports hdmi consumer electronics control hdmi cec you can also connect an hdmi cec.
If your tv has a headphone output simply connect your headphones to the port.
You can easily pair a new amazon remote to an amazon firestick by pressing and holding the home button on the remote.
The micro usb port is used for power supply.
The no signal message indicates a problem with the cable connection or the external device.
The firestick logo should appear on your tv.
Physically connecting the device.
The downsides of using the firestick with an older tv.
On the firestick device you ll see two ports a micro usb and an hdmi.
Set your tv s input mode to av1 or another that matches the port you re using.
This wikihow teaches you how to pair a new remote to an amazon firestick.
Change the tv to the new hdmi input to see if the issue is resolved.
Continue with the instructions from the previous paragraph starting with step 4.
Disconnect the hdmi cable from the tv and move it to an alternate port.
However most lg bluetooth headsets work with any tv that supports soundsync wireless.