If the TV has a cracked screen, the problem is possibly caused by the software of the pane.
If the TV has internet access, please try to update the software of the TV online.
Press the Home 
button on the TV
remote, and select Settings-->Device Preferences-->About-->System update-->Network Update.
If the issue cannot be resolved after updating, please kindly call 南宫ng·28 hotline number for further support.
