* Check the Antenna signal strength, whether it gives readings as per requirement. * As per the behavior of the screen or the speaker, check the different sections of TV receiver. * For Sound Related Issue, Check sound section, Sound IF section * For Video Related Issues, Check video & Chroma Section, Sync Section. * For Completely Dead TV, Check Power supply section, Horizontal Output Section. * If problem found, Replace/ Repair the Component and start the TV.