Modding a TV to always be in AV input mode

Modding a TV to always be in the AV input mode for use as a video monitor, with the help of a data line of the SCART connector. WARNING! HIGH VOLTAGE! This mod may look simple, but this is nothing you can quickly do on your bedroom floor! Carefully study the service manuals, schematics and pcb layouts before you even open the TV! If you are not sure, stay away!