I replaced the Digitizer and the LCD won't Turn on.

I was repairing a customers Nintendo switch, everything worked beforehand, just had some scratches on the digitizer, so he wanted it replaced. I went through all the steps and now the LCD is not working. The switch turns back on, the digitizer works because I can hear the audio, the docking works, all of that is good, but the LCD wont turn on. I have tried using a new LCD as well, but still the same issue. Thanks for the help!