Hi! Thank you for using Just Answer today! My name isXXXXX am happy to help you with this! Please bear with me and be patient as sometimes these issues take a little bit of figuring out before we know what's wrong. If you could give me some more information it will be very helpful: -What is the part number you changed?
-When you plug in or turn on the tv, does it do anything at all? (light blink, click noise, etc.)
-How old is the unit?
Please give me this information and I will be happy to assist you further. Thank you, Tim Nolan