|Either you installed it wrong or the CCFL tube was the culprit.. either on can cause the same symptoms and testing is necessary to locate the bad component.|
Check and recheck all connections from Motherboard toDisplay, and ensure you did not omitt the ground wire inside the Lid. Grounds in the newer Laptops are getting harder to work with due to the replacement of metal parts with Plastic that has a thin-film Metal deposition layer that provides some of the circuitry. (copper color is the clue)
There is nothing to learn from someone who already agrees with you.