Shut the tv off and securely connect the cable box hdmi cable to hdmi 1 on the tv.
Lg tv will not connect to cable box.
Connect an hdmi cable with an adapter if necessary into your computer and connect the other end into the desired hdmi in port on the tv.
To verify whether the cable box or the tv is the cause disconnect the cable box from the tv and connect another external device such as a blu ray player dvd player or gaming console.
Using an ethernet cord connect to the router directly to the tv.
Try using a different hdmi cable sometimes cables can short out or degrade over time.
If you have a smart phone with a hot spot and at least 3 bars of signal try to connect the tv to the hot spot.
Some users have had success using the lg bluetooth rolly keyboard but this is not officially supported.
The available controls will be shown on the bottom right hand corner of the tv screen when the set top box is selected.
This lets us test the tv connection to see if the tv is able to connect to any other signal.
Try connecting the hdmi cable into a different input port maybe the port is malfunctioning.
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Make sure the other end is secure in the cable box.
If the tv continues to display the no signal message the cable box may be malfunctioning.
Once the box has rebooted turn the tv on and use the lg remote s input button to select hdmi 1.
Then use the remote to navigate to home and then select source.
Simply connect your usb cable s to any available usb ports on the tv.
Disconnect the cable box from power for 10 seconds to reboot it then plug it back in.
From there select the pc as the video source.
Not all of the set top box controls will be available.
Hard line to the modem.
A cable or satellite set top box can be controlled with the lg tv magic motion remote control.
Try connecting a different device to the tv or the same device to a different tv maybe the other devices causing the issue.
Bluetooth mice and keyboards are not supported.