Question Dell Inspiron 15 3000 It does not turn on after changing the display

[cubanoldman]

I have a Dell Inspiron at my office that I just replaced the display on. I ordered it from Amazon, after booting up the laptop I got a DELL screen and then a warning that the time and date were not set, I went into the BIOS, checked and everything was fine, I pressed exit and was left with no video. The laptop now won't boot, the processor fan won't turn on, the same with or without battery and connected through the power adapter. What could have gone wrong with all this? I have checked the connections, they all seem to be fine.