[Q] [HELP] Black Screen but Functional Device. Galaxy Note N7000

Hello Everyone!

So i'm really stuck over here. I have an international Samsung Galaxy Note N-7000 that is working but with a black screen!

First of all i want to discuss exactly what i have done:

1.i had a problem with the charging port where it works sometimes and most of the times doesn't. So i decided to order a new charging port to replace the existing one.

2. When i received the new charging port i instantly started to dissemble the device (The device was working perfectly before starting replacement)

3. After i removed the old one and installed the new, i turned on the device and it showed only a black screen, then after some time i saw the touch buttons light, but still the screen is black:crying:

4. so i decided to return back the old charging port and this time when i turned on the device it sounded like it's booting and working but still with a black screen. The phone even received call and the touch screen is working but with black screen.

What do you guys think has just happened to my phone? could the new charging port cause any problems with the motherboard?

i'm really stuck and don't wanna go to a service center

I have recorded a video of the problem. Please see it below

since i'm new over here, i'm not allowed to post youtube link.

please head to youtube and type my username and watch the video : nadeaa0a

thank you very much