hello, on the service remote there are some codes additional to the standard lg codes, you press the instop button, and you must not unplug the set, then a full retune is done, and it cures issues, the remote is available from chs but for something that might be used once its a dear item, we have a few of these remotes and we can lend you one if you want. 07955 108302, take care
there are some detailed instruction which i will send you as a wrong keypress can upset the flash
tony