MacBook Pro Retina black screen on swap

[Fpc]

I have purchased a replacement LCD because my original was cracked. The replacement is for a1398 as is the MBP I put it in. When booting there is no light or power to the new LCD assembly. I have checked the cables over and over, all connecting fine, reset nvram and pram, mac chimes and boots but only shows a black screen. Adjusted screen brightness but no change. I reinstalled the old screen and it booted fine, is there something else that needs resetting or is this a defective LCD?

Thank you

 

[tryrtryrtryrt]

By "nvram and pram" you mean "nvram and smc"? If yes, probably defective LCD if you're 100% sure you've installed it right. On late 2013 replacement LCD worked right after installation, no NVRAM or SMC reset even.

 

[DeltaMac]

Yes
If the display does not light up, and reinstalling the old LCD panel works immediately, then you bought a faulty display panel.