Question Screen won't turn on after LCD replacement

[cjclay89]

I havea HP laptop 15-r210dx that I've replaced the screen on and the screen won't power on.

I've plugged the pc into a HDMI port and saw that it is running and at my desktop, yet the lcd itself is just black.

I messed up a bit, I was putting in the new lcd about a week ago and the 30pin connection slipped. It sparked a lil bit even though the battery was out and it slightly bent the edge of the old LCD connection. After this happened I couldn't get either LCD screen to power on. I figured I messed up the cable so I replaced the 30 pin cable with a new one and still can't get my screen to power on.

I have also tried a hard reset.

Have I fried my motherboard or something? Thanks

I have a 3rd old laptop, I removed the screen out of it and connected it and it lights up white. Its the wrong screen but at least I know theres power to the cable now. I'm starting to think my new lcd is bad. What do you think?

 

[hang-the-9]

Were you replacing a bad screen or just trying to get a better quality one? Having the screen light up won't really tell you if it's a screen issue or not.