Black black screen - Xiaomi Mi 9 Questions & Answers

Hi! Can anybody help me please? I replaced my mi9 screen and it was working perfectly. Second time I did it, I installed the battery connector before the screen connector. Now when I press the power button, I can feel it vibrate, which means it boots, but the screen stays black. Any ideas please, can it be fixed? Thanks in advance!!!

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6515 white screen :(

Recently I've got an 6515 as deffective. This unit boots, and syncs with PC correctly, but the screen showes only white all the time. Please, help me with a solution! Thanks ahead!
Open the screws holding the case and re-plug the screen connector.
It's as simple as that.

[Q] Lumia 1020 with partial power. please help.

I bought this Lumia 1020 off eBay with a broken screen. When I got it the LCD didn't work so I ordered an all in one piece thinking that would fix everything. I put the screen in last night plugged it into the charger and the windows home button blinked until it buzzed but the screen never lit up. I can hold the camera button and the camera will make noise and the flash will go off but nothing else. I can push the screen buttons and they will vibrate but the screen wont light up. I plugged it into the computer and saw that I was charging and had 20% battery power and climbing. I tried to use the windows phone desktop app but it just told me the phone was locked. I took the phone back apart and realized the proximity sensor ribbon was separated from the front camera ribbon. Could the phone shut the screen down if it doesn't get a signal from the proximity sensor? Any and all help is appreciated and thank you in advance.
Hellboy22 said:
I bought this Lumia 1020 off eBay with a broken screen. When I got it the LCD didn't work so I ordered an all in one piece thinking that would fix everything. I put the screen in last night plugged it into the charger and the windows home button blinked until it buzzed but the screen never lit up. I can hold the camera button and the camera will make noise and the flash will go off but nothing else. I can push the screen buttons and they will vibrate but the screen wont light up. I plugged it into the computer and saw that I was charging and had 20% battery power and climbing. I tried to use the windows phone desktop app but it just told me the phone was locked. I took the phone back apart and realized the proximity sensor ribbon was separated from the front camera ribbon. Could the phone shut the screen down if it doesn't get a signal from the proximity sensor? Any and all help is appreciated and thank you in advance.
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Can you press the hardware buttons (back/home/search) and it vibrates? I suppose the screen/touch panel is not correctly connected to the device somehow...

[HELP] Black screen on new phone screen

Hi, my screen broke recently and i can't use the tactil touch. I can see the image but can't use. So i decided to buy a LCD + Tactil Touch + Frame. I didn't mount yet the screen. I only disconneted the screen flex and connected the flex of the new screen. But the problem is that is black. The screen seems to turn on but i don't see anything, is all black.
EDIT: I don't know where to ask. I flashed to the stock ROM, 4.2.2 and still black. I updated to the last version Sony has for my phone, 5.1.1 and still is black. I don't know what more to do. Is all working good, even the sounds when i touch the screen. But i can't see anything the screen is working but there's no image. My phone is Xperia Z.
Anyone?
Please help!
Broken screen? Is the old one still working? If yes: return the new and broken display and get a replacement!
The touch("screen") and feedback (vibrate and sound) will work without the lcd! It is a different layer on the screen and is seperatly connected to the mainboard of the cellphone. Also your screen could be working and your backlight not! Turn on the phone and point a bright flashlight on the screen, maybe you will see something, but even then, get a replacement.

Software or Screen issue?

Hey gusy i need a little help. Recently my phone started studdering out of no where and then the screen went blank. Could this be a screen issue or a software issue? It vibrates and tries to register the finger unlock method but nothing comes up on screen. I contacted my seller and they will respect my warranty but the shipping is a little expensive. In case i cant fix it myself i have no other choice but to send it.
I have tested hard rebooting it. And nothing. I just vibrates and nothing comes up on screen.
It enters fastboot but the icon is green and appears for a fraction of a second and it dissapears.
It makes sounds when i plug in the charger and when i run low on battery. It vibrates when i put my finger where the fingerprint unlock mechanism is.
I have videos of the tests but since i'm new i can't link them in this post.
Any help will be appreciated.

Black screen problem

I have a red magic 3 with a black screen problem. It happened to me before and but fixed on its own. The problem before was a backlight problem because I could see (barely of cause). But now, nothing. The phone did not fall on the ground, besides it has a case protection. The problem happened when I manually turned off the screen and it never came back on. I have the LED indicator showing me that the phone is on but nothing else. The vibration happens when I unlock it so it's not a touch screen problem. Any advice would be greatly appreciated.
Does it show boot logon when it starts? Try to boot into recovery mode and do a reset if possible

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