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Marriage and RepairXiaomi Redmi 4 / Redmi 4 Prime
Xioami Redmi 4 / Prime 4
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Useful

Spare parts / accessories

Problems and solutions

A note on how the phone works in 4G mode
We treat hangup and subsequent shutdown of the phone by changing the modem modes
Replacing the display module assembly with frame

Previous polls

Problems with Redmi4

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Post has been editedMgalex - 03.05.18, 13:31

Reason for editing: Parts / accessories

[sataniq]

doktop_7,not an electronics engineer, I will not say. Posherste topic as follows, something was about it.

[kont131]

Friends, tell me. The fingerprint sensor does not work. When you touch your finger, the lock screen turns on. And most importantly - you can not remove previously clogged prints. Thank you in advance.

The same, only happened 08.03.2019

Post has been editedkont131 - 10.03.19, 03:26

[icecoolhdd]

Hello everyone, tell me what it might be like ... the bodies turn off by itself. Does not react to anything, incl. on charging. If you hit it lightly on the table :) it can come to life and boot up normally. The time and date will be reset.
MIUI Clobal 10.2.1.0 (MBEMIXM)

[Andrylia]

icecoolhdd, Contacts from the battery go?

[icecoolhdd]

Andrylia @ 03/11/2019, 15:07

icecoolhdd, Contacts from the battery go?

Did not understand, maybe

[Mayffert]

Hello! In general, the trouble happened: I drowned the phone a little in the bathroom) turned it off, but it turned on itself. The screen worked for some time, then only the backlight remained and nothing more ... Before the screen completely died, it turned on the wifi and connected to the computer in order to save some information. While there was a transfer I decided to disassemble. All would be nothing, but got to the battery, I think let me carefully remove it. And he, the reptile, was glued to a 2-sided adhesive tape ((He picked and picked at it with a sharp metal object, and he punctured it with a short ((
As a result, the screen is dead (it seems), the battery is accurate, maybe something else got burned when it was shorted.
Does anyone know if it is possible to start the phone without battery by connecting it to the computer? I tried to connect (to the computer and through the adapter), it vibrates every 15-20 seconds and everything, no more reaction. How to get info from memory?)

[Toxin2.0]

phone does not vkuchatsya
Today, the battery has plummeted by 20 percent down and turned off
I turn on - there will be a system boot, as after installing the firmware
An hour later died completely
I connect to the PC and the error qhsusb_bulk
does not work for combinations
+ yesterday updated the world

[Rophnus]

Guys, the phone has stopped seeing files, but when connected to a computer, all files are visible, but nothing can be done with them. when copying an unknown error. help plz

ps program files like cards and the programs themselves work and are visible ....

[Rophnus]

Help guys plz

The phone stopped seeing all the files (pictures / music, etc.) while all third-party programs and their files work (for example, Yandex maps, maps are loaded and visible)

when connected to a computer via usb (MTP), all files are visible, their size is visible. but nothing can be done with them when copying an "unknown error". help plz

Post has been editedRophnus - 13.03.19, 22:01

[strelnik]

Good evening, please tell me what could be the problem, changed the display, after the assembly the microphone does not work, the bottom board where the microphone is located, did not even remove the interboard cable, I can not understand it. For earlier thanks ...

[akimm-off]

Comrades. The phone was not charging. In the service, the month was pooled and not repaired. Found an articlehttps://pikabu.ru/stor…_zaryazhaetsya_5657089. Everything is working. Add to the cap. If you already have, then do not kick. There is a charging feature, at least for me. Charged only when rebooting with the cable inserted or off.

[vetalij]

Akim-off @ 03/14/19, 09:34

Found an articlehttps://pikabu.ru/stor…_zaryazhaetsya_5657089 .

Link is broken.

Akim-off @ 03/14/19, 09:34

There is a charging feature, at least for me. Charged only when rebooting with the cable inserted or off.

Replacing the power controller, if you do not replace the phone after some time, refuses to charge in any mode, by any means.

Post has been editedvetalij - 14.03.19, 13:13

[Werekira]

akimm-off @ 03/14/19, 11:34

https://pikabu.ru/stor…_zaryazhaetsya_5657089

The service waited for a fee for two months, apparently with Ali. The phone never charges. I am taking today. And then the link is broken with a possible solution ...

[Jiench]

I want to share the experience of buying conversational dynamics for Redmi 4 Pro from the Chinese.
Shop: XXXXXX Store

https://aliexpress.com/item/-/32870676807.html?spm=a2g0s.9042311.0.0.4f174c4dMUkV2C

At the top of the store name and link to the speaker itself. I highly recommend not to buy. I first bought one speaker, set it up, it works, but it’s very wheezing, sometimes I don’t understand anything about what they say. The dispute did not open, I decided 80p is not great loss.
I wrote to the seller, said that I was going to buy a second one, but before sending it, please check it out. first came defective. The seller, in response, assured that all the goods they send are first tested.
In general, the second speaker is also defective. It works, but only the dial tone is barely audible when dialing the number, the interlocutor cannot be disassembled at all .. He opened the argument, almost immediately he was accepted in my direction.

[victorY78]

Hello. Today, without any reason, the sound from the main speaker disappeared. Maybe someone had this problem. Share your solution experience.
Yes, add a little, just appeared for two calls and disappeared again. Tell me how to deal with this. Thanks in advance.

Post has been editedvictorY78 - 20.03.19, 15:29

Reason for editing: Adding information

[ks1797]

victorY78, check in the test menu * # * # 6484 # * # *. It was when I disassembled and cleaned it after water hit, slightly unbent the contacts on the speaker and assembled it, everything worked. If that sort and see. Well, for starters, you can reset to factory defaults, although if the test menu fails the test hardly helps

[sataniq]

victorY78,have you got a case of metal dust is not stuck? Disassemble and inspect

[Pueraunaut]

doktop_7, the microphone failed on the original board, which caused the search for a new board. Fee acquired neorig. Exactly the same problems with the battery and with the connection. Apparently the reason is that there are no 2/3 of the strapping around the connectors on the fake board. And the connectors there are just antennas as well. The antenna itself is in the case and could not change it, it just connects through this board.
As a result, the microphone on the original board was perpaya and everything worked perfectly.

[Pueraunaut]

Mayffert, it’s a pity that you didn’t seem sensible to disconnect the battery cable (which is actually much more important, in order to avoid electrochemical corrosion)
before trying to take it out. And I didn’t think of warming up the phone before starting to pick up the battery with sharp objects to soften the adhesive tape (you see, and it would dry it, and you might not have to disassemble)

[Makkah]

Tell me, can anyone come across ... The microphone stopped working during the speakerphone, how to solve the problem?