Macbook mid 2010 Black screen

[Macbik]

Hi, I have trouble with my macbook mid 2010.
I repleace screen 1 week ago, bcs bad colours on old screen.
1week works normal, but this morning I turn on Macbook and only White screen. I tryed repleace to old screen and still White screen, so I put back new screen and Now only Black screen. (Now with old and with new screen not turn on screen, just black screen).
I tryed new cable to LCD, but still same.
I turn on, macbook sounds boot,but screen nothing.
Thx for all tips and helps

 

[MultiFinder17]

Do you have an external display to plug into it? That'll at least let you know if it's booting or not. External displays are always my first stop with potential screen issues on laptops.

 

[Allentalini]

Best thing I can think of is the "whole assembly" needs to be replaced

 

[SecretSquirrel]

I feel your pain - starting with an external display is the best starting point I can recommend