Xiaomi Redmi 4x Display stopped working - Xiaomi Redmi 4X Questions & Answers

Hello,
my Redmi 4x display stopped working after I had it in my back pocket whilst riding my bike. Display did still work but I couldn't use it anymore. Now I changed the display unit but the problem is still there, display lights up and shows me my background but then I can't use it. Also when I go to recovery mode I cant select anything and there is chinese and a lot of times the word fail.
Uploaded a picture of it here: ibb.co/fHTVPW9
Thanks in advance for any help.
Greetings
Alex

Did you test new replacement display before installing it, if it is working properly? it could be faulty display or maybe loose connection of digitizer flex cable.

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Touchscreen not working but it shows image

Hello!
I have a LG Optimus Black , and the touch function of the screen is not working anymore but the display shows a normally image at startup and I don't know what can I do except flashing it's firmware.
Can you give me some options to repair the device? The screen isn't broken, when I taked up from the computer's table, doesn't react anymore ( and I found the battery discharged )
Thank you!
Even after a reboot(battery pull) it doesn't respond?
You should take it to a service center.
FDN
Maybe there is a problem with the ribbon cable connecting the digitizer to the mainboard. I once saw this on my former Galaxy Ace. Since this is very tiny I would also advise you to take it to repair center - I broke my Ace when I tried to fix it myself...
I had had this problem too and I took my phone to service center,
they replaced the screen.
It appeared on my phone without reason , it's really a strange problem.

LG P970 - LCD not working

Hi everyone, I have one serious problem with my LG OB P970, phone working but LCD don`t work. When someone calling me, phone ringing, I hear sounds when connect to charger or connect to computer.But when I turn on phone, LCD not working, only buttons lighting. I tried with other screen, but still have a problem. Also tried update (with LG smart flash tool) and everything it`s ok, flash is successful, but again no lcd. Backlight working (when phone is On, LCD is dark grey because backlight light, PDC connector on motherboard also it`s ok. I hope that someone can resolve my problem or have any idea. Thanks

Quick test of replacement LCD not giving results, can I get some help please?

My phone's screen died. The backlight to be precise. The touch works fine, and even the screen in fact if I look at it under bright light, shows information. I want to replace it. I went and bought a replacement. Opened up the unibody, unplugged the batter flex and the one below it.
My question is:
Can I just unplug my current screen's flex (display flex, top left corner) and plug in the replacement's flex, and check? Because when I do it, nothing happens. The screen doesn't come on, neither do the capacitive keys (they light up on the current display if connected). The touch works fine though and so do the keys (I can invoke Cortana etc using the search key for example)
I am wondering if the only thing that connects the display unit (touch plus LCD) to the main board is that single flex, or are there other contacts that are used when the phone is completely put together. Because the screens I've tested (several) didn't light up at all, just the touch worked.
This would really help because I could then buy a screen and finally get down to the complete required disassembly (which isn't that simple or easy) and rest assured before doing so that my replacement screen works.
A possible reason that the vendors I went to buy the LCD's from gave me was that this might be a version conflict. Though I feel the hardware for these phones is the same. And the only version conflict I have come across would result in the touch refusing to function. The screen would always work (eg Lumia 620 after Lumia Black update) My phone was bought from Saudi Arabia (EMEA) and I am currently and indefinitely in India where I'm trying to get a replacement LCD that works. This shouldn't be a factor though because my Lumia is the RM-937 (international variant) which is the same one you get here.
Any expert help on this would be really really helpful.
PS: I know I could post this in the Lumia 1520 forum, but I'm posting it here in hopes of getting a quick reply as I am sadly pressed for time with my only phone I use for everything including work, not having a working screen. Cortana is really my assistant as she is the only way I use my phone at the moment.

Help with A2 display and touch replacement

Hello.
First, sorry for my english, i'm from Brazil. kkk
I need help to my xiaomi a2.
I broken the touch, but not the display, and the smartphone work perfectly.
I bought a new touch and display, but, the display not show any image.
I feel the phone shake when i press the power button. Instants later, the fingerprint works when i touched.
The touchscreen shake(shake?kkk) when i touched, like a normal work, but, the display not response.
The ilumination leds from display is on, but the display not worked.
The new display don't work or i'm brick the cellhpone?kk
Ah, The old display crashed and i can not test the cellphone.
The rom is original, no root, all original factory.
Has anyone ever experienced this?
Help-me kkk
Thanks
andertrumpet said:
Hello.
First, sorry for my english, i'm from Brazil. kkk
I need help to my xiaomi a2.
I broken the touch, but not the display, and the smartphone work perfectly.
I bought a new touch and display, but, the display not show any image.
I feel the phone shake when i press the power button. Instants later, the fingerprint works when i touched.
The touchscreen shake(shake?kkk) when i touched, like a normal work, but, the display not response.
The ilumination leds from display is on, but the display not worked.
The new display don't work or i'm brick the cellhpone?kk
Ah, The old display crashed and i can not test the cellphone.
The rom is original, no root, all original factory.
Has anyone ever experienced this?
Help-me kkk
Thanks
Click to expand...
Click to collapse
Could you provide images of the phone? Also did you check with the service centre?

[Xiaomi mi 2a] Touch screen does not work after display replacement

Hi, I am new on this forum. So let me known if I used wrong thread I hope I made all fine.
I have problem with my xiaomi mi a2 (mi 6X). I've changed display, because it was broken ( fell out my pocket).
After I've changed display ( screen with digitalizer and frame) it stop working ( no reaction on any touch).
Old broken display was working, before I've changed it to new one.
Now, old and new display does not react on any touch. I've tried few new displays and results are always the same.
I've tried also:
- phone restart,
- factory reset,
- flash new orom,
All above actions does not help. What can I do more?

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