Black screen after logo - General Questions and Answers

Hi i would like to ask for your help on the phone that im fixing right now the problem was the lcd at first because the phone fell the phone was working still but there's crack on the screen and so we bought a brandnew lcd, so i installed the new lcd and then after i turned on the phone its just stuck on the logo and then just go black screen and the phone just stays black screen.
The phone is realme c21y btw

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My Screen doesnt Show anything!

HI!
My phone is the HTC touch HD. My screen had a small dust particle between the touch screen and the LCD. Therefore I dismantled the phone as I have replaced touch screens of the same model phones before. In the process of removing the phone something has happened and now the LCD is not working but touch screen and the phone is functioning. (I connected the phone to the pc via MyMobiler and can see the screen on the PC through the software). I replaced the LCD with a brand new one too but still nothing shows up (not even a white screen)
Any ideas whats happning?
where can give this phone to repair in the UK?
Any place to get this repaired in the UK?

[Q] nexus 5 a black screen HELP !

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i have nexus 5 i installed last week a new screen with frame and work perfect . Today i tried to install a new rare camera coz it was damage suddenly the screen went black , everything was connected well but when i press hard on the back of nexus the screen become on but no touch feature is on and when i remove my hand become black . i want to know what is the part is damage is it my screen or the mother board or the charging part that connect the screen with the mother board .

Black screen after screen replacement. Backlight, phone and digitizer works

Hey guys, I need your help. I have a Moto G 1st gen.
My screen shattered a while ago, and I bought and replaced the front glass panel, and after turning on the phone, I get no display. The phone boots, and the back-light works. The vibration feedback also works, and I see on my router that it's connected to the internet. However, I get no display, just a blank screen, no boot logo, nothing.

Display not working continuously after screen replacement

Hi
I have Mate 7 MT7-L10.
I smashed the screen and bought replacement screen from ebay.
After replacement phone started OK for 2min. After that no display.
I took of lcd connection and reconnect but no luck.
Then tried battery connection and reconnect after few seconds.
It started for a while then turned off again.
So need to do the battery and LCD connection again to get the display.
If I don't flip the phone it stays on display.
As soon as I flip over to put all screw and put the back cover display goes off. Then I need to reconnect everything.
I got display more more than 30 min while just left stable.
Any idea how to fix this.
Thanks
I have the same problem, but in my case the screen displays a set of white footprints, the date and time. It won't let me get past that after. I know it's not the digitizer since I can boot into recovery twrp and make selections, but booting the system brings me back to the display of the footprint in the center screen. No idea why it's like that...only after I replaced my broken lcd it gives me this problem.

Screen problem

Hello i actidently broke my screen. I bought new screen on aliexpress gave my phone to aervice guy he packed it all cuz i bougt screen with frame. And then he told me phone doesnt work MB died. You can charge phone but screen wont turn on. Did anyone had any simmilar situation?

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