Removing phone cover? - Xiaomi Redmi 4 Prime Questions & Answers

So I find myself with a bricked R4P, fastboot only, no EDL and locked bootloader. Tried every piece of deep flash cable advice I can find, to no avail.
Opening the phone up for the testpoints it is then, but I have no idea how to get in to detach the back cover from the rest of the phone. I have phone maintenance tools like nylon spudgers, but the gap between the phone and the cover is so tiny they won't go in, no matter the angle or amount of force i use (mostly trying around the USB port). I've managed to (unintentionally!) unstick the screen from the rest of the phone without even trying, but can't get anywhere with the back cover
Anyone here familiar with opening up an R4P and can offer some advice on how to go about it?
Edit: Forgot to mention, the bottom screws and sim tray have been removed.

Look HERE and good luck.

I just did the same thing today. I also did the same thing as you, I was somewhat thinking it was the screen but there was only one way to find out. I had to use quite a bit of force and go over it many times with plastic tools. I started to pry it up slightly and put guitar picks in, that worked alright. I got a metal tool and pryed it up a bit, then used it to work around the outside.
I'd hear sounds when I could get the tools in, not sure if it was the plastic bit bending inwards below the metal cover or if it was breaking the seal. I was going slowly to be careful. It might be noticeable when I put it back together, I'm not sure.
I saw a video where the one guy used his fingernail to pry it apart in like 30 seconds. I feel he has already taken it apart.
I tried hitting the test points and it wasn't coming up under the COM ports for me. Nothing I have done has had it show under COM ports (maybe EDL would have worked, it didn't on a few computers and VMs that I used). I will try again tomorrow.
Edit: Other videos made it seem super simple also. Admittedly I don't have tons of experience taking unibody phones apart but it seemed harder than the videos implied. Others may have some technique tips.
I'm not sure if it's mentioned anywhere but I think the three screws to the cage are Phillips 00, it what worked for me at least.

spkprs said:
Look HERE and good luck.
Click to expand...
Click to collapse
This method is what exactly i have done. and i use a bit force, as in the Video he use an instrument which i have lack.
---------- Post added at 12:37 PM ---------- Previous post was at 12:35 PM ----------
thegreatbmn said:
So I find myself with a bricked R4P, fastboot only, no EDL and locked bootloader. Tried every piece of deep flash cable advice I can find, to no avail.
Opening the phone up for the testpoints it is then, but I have no idea how to get in to detach the back cover from the rest of the phone. I have phone maintenance tools like nylon spudgers, but the gap between the phone and the cover is so tiny they won't go in, no matter the angle or amount of force i use (mostly trying around the USB port). I've managed to (unintentionally!) unstick the screen from the rest of the phone without even trying, but can't get anywhere with the back cover
Anyone here familiar with opening up an R4P and can offer some advice on how to go about it?
Edit: Forgot to mention, the bottom screws and sim tray have been removed.
Click to expand...
Click to collapse
If you haven't open yet then Use the Chinese Recovery Method as its work fine For me.

Thanks so much guys.
@Pyro00 - I've just gotten 9008, so here's exactly what happened, hopefully it'll help you out:
Have the battery well charged
Boot into fastboot mode (Power+VolDown)
Have the phone connected to the PC
Type "fastboot reboot" into a command window where fastboot is available (e.g. "c:\program files (x86)\minimal adb and fastboot", if you have that installed), but don't submit yet
Short (and hold) the two testpoints (to the left of the left-side battery connector, just above the battery)
Submit the fastboot command - phone will "power on" vibrate briefly, then do nothing - you'll be familiar with it I don't think it matters how long you wait as this point, as long as you give it a few seconds
Release the testpoints - the phone will power on vibrate again
Quickly (I'm not sure of the timing) short the testpoints again. The PC should immediately recognise the phone as 9008.

Related

Broken Screen on my XV6800

I dropped my XV6800 on a curb yesterday. The picture on the screen is fine, but it looks like the touch screen cracked and now no longer works. The phone won't even let me unlock...don't ask why I locked it after that happened Anyway, I can't do anything with it at all now except receive calls.
What is the cheapest and/or easiest way to fix this? Good source for parts etc..
Thanks!
use mymobiler on computer to unlock and such. But a new touch screen off ebay and put it in.
My Mobiler won't install because I can't unlock the phone to allow it to install. I ordered a screen from eBay.
hmm i didnt know it wouldnt install when locked. Does it go to locked after a restart.
Yeah, that's the first thing I tried.
I've been looking at the instructions on taking it all apart. It is a little bit intimidating, but I suppose I've done worse.
Lots of Screws
I had to replace the screen on mine a while back. It is actually pretty easy. There are just two things to remember
1) There are a lot of screws, remember which order you took them off in and which hole they go into
2) Nothing has to be forced apart, everything has screws or tape holding it. It is okay to take off the tape, and if the tape doesn't go back on it won't hurt anything.
The screen connects to the motherboard by a thin, flat plastic wire. DON"T JUST YANK THE WIRE OUT OF THE CONNECTOR!!!!!!!!! The connector has a little flip up on the end of it that allows the wire in and out.
Good Luck
Calis said:
My Mobiler won't install because I can't unlock the phone to allow it to install. I ordered a screen from eBay.
Click to expand...
Click to collapse
Open the slide out keyboard and type in the password! I did that one time just to see if it works. This will solve the lock portion.
Well, I got the new touch screen, cleaned the shattered bits out of the old one, cleaned it all up good...changed it out, put it all back together...I must not have gotten the cable seated right.
Also, as for typing my password on the keyboard...no password.
Final update:
I got it to work.

Battery won't charge, power button broken, me going crazy

Ok, im going to start not from the beginning beginning, but from where problems started.
Friday night, went out, I was writing an sms when somebody pushed me and i dropped my wiz, i picked it up, to find that the battery was gone, nowhere to be found, i did find the cover tho. i tried to look for the batt, but i was in the middle of the club so it wasn't that easy.. I knew that a friend of mine had a spare one so i didn't worry that much.
Sunday I got the replacement, tried it, no luck, it ran out i thought, but when i tried to charge it, nothing happened. Buying a new one is not that easy when you are in Argentina, and they are expensive, so i decided to jump sart it. good news: it worked, i could turn on the phone, so the battery is fine. bad news: it still doesn't want to charge!
I previously had problems with the usb, and i had to have it soldered again, pretty strong, but I thought that might be the problem again, so i disassembled my wiz. new problem: the power button broke, the tiny, tiny black piece fell off, AND I LOST IT! DOH!
Anyways, the usb is still soldered pretty strong, i don't think its gonna go loose again, so thats not the freaking problem!
So now, instead of the initial no-charge problem, i have a disassembled wizard, that won't charge the goddamn battery, AND a broken power button (tried to glue it, but fell off again and thats when i lost the piece).
Regarding the button, i've studied my options, what would you recommend and how would you do it?
option 1: turn on the phone with the soft reset hole, and remap the screen on/off function to another button.
option 2: replace the power button internal piece with the one from the voice command button (i never use it). i've taken a look and they seem to be the same, but i don't know if taking it off and soldering it back would work..
anyways, that leaves me again with my initial problem, and i do have an hypothesis. I THINK (because I THINK i remember this happening to me before), that the battery won't start charging until windows has started, and the jump star power the battery has is not enough to get it started (tried to tape it and leave it for a while to see if it charged a bit more, but didn't work, the phone turns on but goes out when loading, and since i've my wiz pretty loaded it takes its time to load).
So to try this out i would need a way to charge the battery manually, and i don't have access to another wiz to have it charged (my friend had a spare batt because his wiz is broken).
So, if you have a solution to this, ANY different solution, or even an IDEA, please give me a hint!
For what i've read, this are common problems, so there must be something out there.
Man, that's a bad thing
I'll try to help you as much as I can.
You are right about Wiz only start charging when it's on. After my N78 was stolen and I went back to the Wizard, the battery was without any charge for months... I plugged it and no red LED... Turned it on and, bingo, red LED and charging!
The voice command and the on/off buttons are the same, so (in theory) it would work 100% IF you were able to change their places (at least for me, it is impossible to do manually, never found any good equip here =\ )
With a lot of patience (and a small soldering iron) I would try to take the voice comm button off and place it where the on/off was.
For the battery, maybe someone here can point if there is a "battery charger" standalone device, or such a thing...
Good luck man
hey thanks for the quick reply!
i'm not thinking of doing it myself, i'm not not that precise nor is my solder, but i know a guy, same dude that fixed my usb. I like that idea more than the other, but i guess that remapping the screen on/off and using the soft reset button would be much safer.. i haven't made up my mind about that yet.
Weir thing about MY wiz, at least thats what i think happened to me last time my battery was completely discharged, is that not only the device must be ON for it to charge, but it needs to have WINDOWS already loaded, i know for most devices it's not like that, but i think thats how mine works, or at least thats the only explanation i could find!
btw, i love your case modding concept, and since i might have my wiz sitting for a while, i might go ahead and try something too! nothing as extreme as yours of course.. i'd love to see more updates on your project along with some guide to see what ideas i can take
slight detail while thinking my options.. if i was to remap the screen on/off function to another button, would i need to have the device in sync? or connected via cable? because when i had the usb soldered, don't know how nor why (all the pins seem to be ok) but the device won't be recognized by any computer, usb only works for charging (or used to work, at least, still haven't figured why it won't charge now).
If its only an app that i can load to the phone, once i have it working (that if i ever will), i can load the app thru minisd, BT or IrDa so that would't be a problem.. i haven's investigated that issue yet.
Hey jinxie, how's your Wizard?
If you're still stuck with the battery (I hope not), check this out...
I think this will solve your battery problem:
http://forum.xda-developers.com/showpost.php?p=4963547&postcount=5
That's probably to work, just be carefull with the battery's temperature. If it starts to heat, stop the process and wait it to get normal, then start again.
Good luck!
i tried keeping the wires attached to the contacts for a while, didn't think it'd work better doing it just for a little and then repeating the process, i'll try that!
yeap, i'm still stuck and i think i will be for a while, i have to solve the battery issue first (would be useless to do anything else if i'm not certain i will get it to work), then i have to decide what i am going to do with the power button, and then i might paint it, i'm thinking matte black, or maybe take some ideas from your project if you have made any progress at the time!
thanks for the tip, i'll try it today and i let you know how it went
development: phone DOES NOT turn on with the soft reset button as i thought, i was sure it did, but after jumping the bat once again, tried the wiring method (not repeating the jump start but wiring it directly to de device pins), and tried to turn it on with soft reset and dind't work, while it does turn on with the power button, wich is broken, so in order to turn it on i cannot have the phone assambled, wich means that in order to try to make it work, i will need to hold the battery attached with my hands, and it is a pain in the.. you know where.
update: i wired the charger i was using to jump start the battery to the pins in the wizard, then held the battery in place with my hand, with a small screwdriver i pushed the broken power button. wizard turned on, IT FINALLY LOADED WINDOWS, but don't rush, i then (with my MOUTH) connected the USB wall charger to the port in the phone, and removed the wiring, i was expecting the goddamn light to turn on and the screen to tell me that my phone was finally charging. I WAS WRONG. then i had to let go because my hand was killing me and it went off
and the damn thing refuses to charge! what could it be????????
2nd update: I AM MACGYVER !
i figured the wiring had given the bat enough power to load windows on its own, so tried once more holding everything together with my hand but without wiring the pins this time, and at last the amber light turned on!!! im so proud of myself lol
SO NOW: device works ok, charges ok, battery has enaugh power to load windows, WHAT CAN I DO ABOUT THE BROKEN POWER BUTTON? i know you can't remap the power function since its hardware, but the screen on/off function might be remapped. soft reset button DOES not turn on the phone, is there any other way of turning it on? or my only option is to take off the voice command button and soldering it where the power button should be?
well, found the little button part that was missing, glued it (yes, GLUED it), and it kinda worked, i had painted the casing already, so i assembled everything back again. i used a folded piece of paper to hold the button still so it won't fall again and i think it was too big cause now its kind of hard to press but i can live with that, what i cannot live with is NO SIGNAL.. i mean, CMON!! are you kiddin me? now that the button works, battery works, phone assembled, and now this?? when i dissassembled the phone i forgot to take out the sim card, so the metal parts that hold it opened a bit, but i pressed them back, the sim in no way loose, so i guess i might have screwed the attenna :S
i've just checked, i can see the sim contacts so... [CENSORED] !!!
also now the screen looks weird.. like if it had less colours, like when you format your pc and haven's installed the graphic drivers yet, 3d effects look funny..
Hey man, have you painted ALL the Wizard parts, on both sides?
'Cause there is one that has a piece of copper board inside. It makes contact with the antenna. Without that contact, you'll never have signal
The piece I'm talking about is the one that has the camera protection, saying "1.3 MP camera". Look at its back and see if there's no paint on a green and golden plate. Remove the paint if it got there (the golden part is the important one, since it makes contact with the antenna).
Good luck man!
hahah lol, no of course i didn't paint both sides! but anyways im gonna take it apart again, clean it, and try again..
done. it had some paintng yes, but they were very tiny spray drops, so i don't think that is, anyway i cleaned it. On the other hand, i found that the antenna is loose on the left side :S what can i do about it?

[How To] Fix Blank/Garbled Screen Issues

Last night my Transformer started acting up. I was browsing Facebook, and then I hit the back case just right while setting it down and the screen went all green and purple (garbled/glitchy). I kept pressing it and eventually the screen completely shut off, though the backlight was still on.
In this small "how to", I will show you what you need to reconnect to get the screen back to operational status.
There are two sets of tear down pics for the TF that I found. One comes from XDA member hybridau, found here and the other is Tech Republic. I'll be linking to pics from Tech Republic along with my own as they were a little more informative.
Take the device apart. Torx T5 is needed for the bottom. Work your way from the end they show in the picture here. Then, press down hard (but be gentle ) on the side until the bezel disconnects from the base (pic). Next, gradually work your way around until you get to the dock connector. I used a thin piece of plastic to go around the edges, but I've heard a guitar pic works well (I don't own one). Note: for me, the dock connector was the most difficult part of the bezel to remove.
Remove the four screws around the screen area and then the three around both long sides (six total).
Turn the device over (screen facing down) and remove the back cover (pic).
Now, look for the piece in the pics below. The ribbon needs to be pushed all the way in where you can't see any of the connectors. Mine was visibly out of place. It won't be fully out of place. I used my fingernails to gently move it back into place one side at a time. You may want to try something else... it's not the easiest thing to move back since there is tape that was/is supposed to hold the thing in place.
Full device view:
That's it! I turned it on while it was apart to make sure screen worked, but that's up to you. Put it back together the reverse way... much easier putting it back together. I put the bezel back on the opposite direction I took it off.
Little background on the device:
The device has been dropped a few times while in a protective case or when tossing onto the bed (no visible signs anywhere on the device -- seriously, the device was thrown and dropped more during shipping than it was in my possession), so I called ASUS and they issued an RMA on it. Of course, if the issues are caused by you (dropping), you have to pay. Regardless, shippings going to cost some money.
Thus, I took it upon myself to fix it. I knew it had to be a ribbon that was disconnected because I doubted it was any kind of screen problem. I had also read in another thread here that that when they sent their TF off the return said all the techs did was reattach the ribbon. What a waste of time, money, and effort?!
Anyway... hope this helps someone with the same issues I had!
Thank you very much for the details. It doesn't effect me but I have read several threads where people are having this issue. I am asking a mod to sticky this for awhile so it doesn't get lost
Thanks! I just hope it helps someone else contemplating doing what I did. I almost wasted time and money sending it to Texas for repairs!

TF101 Volume up button broken - workaround

I'm posting this in the hope that it saves someone else some headaches.
On my TF101, the volume up button quit working - the switch died, not just a misalignment of the plastic rocker. This only became a big deal when I needed to reflash my firmware because my WiFi was hosed after a bad round of ROM flashes (see http://forum.xda-developers.com/showthread.php?t=1537234 ). If you find yourself with the need to get into APX mode and have a bad volume up button, you have problems.
This is not a fix, nor is it elegant, but it recovered my Transformer, and that's good enough.
I first pulled the bezel from the TF101. It's not terribly difficult, but it does require patience and care. I found several folks on XDA discussing it (search for "bezel"), but the gist is that you remove the Torx screws from the bottom near the charging port and VERY carefully pry the bezel up.
Once I had access to the switch (and realized that replacing it was beyond my soldering skills), I fiddled around until I found a way to short around the switch and fire the vol+ function. I used a very thin, yet rigid, wire (actually, it was just a twist-tie) to short from ground to the bottom side of the volume up switch (as seen when holding the tablet in landscape orientation). The contact point is actually the solder that connects the switch to the PCB, so it takes a few tries to get it. Shorting to ground is exactly how the switch operates when it works, so unless you jam the wire deep into the innards of your tablet, this should be harmless (of course, anyone one pulls the cover off their tablet is already way beyond voiding the warranty and is assuming responsibility for all damage already).
I've attached a picture that shows the wire in place to trigger the vol+. In this case, I used the screw at the corner for my ground and secured the wire under the screw to make it easier to handle. It took a few tries to get the tablet into APX mode, but it did work and I was able to restore to stock and get my system working again.
I hope this helps someone here.
Cheers!
--Roger
Not that I need it..
But that's one Hell of a fix..
I had to do that to a grid laptop one time..then found a video on YouTube in how to pull it apart to load a new switch in..
sent from yet another MikG HTC Evo

[Q] Replaced battery - now touch screen doesn't work right

No amount of recalibration would correct my bad battery so I replaced the battery in my Nexus 10 (running lollypop). It was a complete pain to get the thing apart but it wasn't all that complex. I wanted to test it with the back off but the new battery was dead and I figured, “what could I possibly have done wrong anyhow” so I put it all together and charged it. I found out what I could do wrong. Now that I have it back together and fully charged the touch screen doesn't respond hardly at all. Everything else seems fine. I can boot to Android, boot to recovery etc... Like I mentioned above, taking it apart is a PITA and I'd like to only do it one more time and forever be done. I am guessing one of the 3 ribbon cables over the battery is for the touch screen. I'd like to only fiddle with the right cable only. Does anyone know which one specifically affects the screen?
Jerryp7
Did you find out what the problem was with you tablet. I have the same problem. I'm sure its the ribbon cables but I don't see anything out the ordinary. Thanks.
John R.
I had to open it back up (which is what I wanted to avoid because it was such a birch). Everything looked OK but I unplugged and replugged everything and it's been fine ever since. It had to have been one of the ribbon cables.
Replaced battery - now touch screen doesn't work right
Jerryp7
Thanks for the quick reply. I reopened the table and found the locking bar on one of the ribbon cables is broken. Any idea if they can be replaced?
Thanks again.
Regards,
John R.
Success!
Jerryp7
The clamp for the ribbon cable wasn't broken! The movable part had become detached. After many tries I figured how it went back together. I then found that it helps to hold the cable into the connector as you close the clamp.
Murphy's law rules again.
John R.
Glad you solved it. My only suggestion was to form a little plastic hold-down and super glue. If you ever had to do it again you could snip it off.
Jerry
The new battery still didn't correct the problem with the battery quitting at about 25% left. Do you know if there is any else I should try. I was in contact with Google before I replaced the battery and followed several procedures they suggested. Needless to say none of them worked. When I try to wipe the system cache partition I never get the screen that allows me to select the Recover mode. I get a screen with an arrow on the left that says "Start" and a droid in the center with the words "Downloading" under it. I let that run for over an hour but it didn't appear to do anything. If you have any suggestions I would appreciate them. Thanks.
John R.
Not sure. I'm not having any problems. Have you tried recalibrating the battery? I did that before replacing it which naturally didn't help a bad battery. Is you device rooted? I think it has to be to recalibrate. I use skipsoft unified android toolkit and have been for years. Last thing I did was upgraded to the OTA Build LMY49G which breaks root but the toolkit rooted it even thought Mark doesn't have the factory build availiable yet.
My connector broke when I was changing the battery. Anyone know how to fix it? There was little silver pins that came out. Thanks for help in advance.
Sent from my Nexus 7 using Tapatalk
For what it's worth... I had this same problem and was able to fix it fairly easily (if you don't count the PITA of opening the case again). The three cables have to be connected perfectly, which is why they are taped down. The one on the far right (if the device is oriented so the edge with the controls is on top) connects the LCD (it's labeled as such). I have lighted magnifying goggles that I use for many things. I carefully removed the tape (again), opened the locks (again), pulled out the cables, then pushed them gently back in, making sure they were in as far as they could go, all the way across (the goggles make all this very easy to see), and then closed the locks. I did this with all three ribbon cables. I then examined the tape for lint, cleaned off any dirt with 99% isopropyl alcohol and no-lint chamois swabs (just dab it lightly - don't remove all the glue), then pressed the tape down very firmly. When I closed the case again, all was well.
Opening the case isn't nearly as easy as those YouTube videos makes it look. But I'm so glad I did this. It's great to have a working battery again.
Next: Install Android 6!
JohnR0836 said:
Jerry
The new battery still didn't correct the problem with the battery quitting at about 25% left. Do you know if there is any else I should try. I was in contact with Google before I replaced the battery and followed several procedures they suggested. Needless to say none of them worked. When I try to wipe the system cache partition I never get the screen that allows me to select the Recover mode. I get a screen with an arrow on the left that says "Start" and a droid in the center with the words "Downloading" under it. I let that run for over an hour but it didn't appear to do anything. If you have any suggestions I would appreciate them. Thanks.
John R.
Click to expand...
Click to collapse
I have the same problem, replaced the battery tried 2 different recalibrate apps, tried factory reset, cleared cache and battery shuts down at 20% with no warning.
It's the first cable if you have the camera facing upwards. There is the 2 cables that are together, it's the first of those cables that controls touch on the screen. Just make sure it's seated correctly, press down on it some and close the tab and tape it back in place. I know this because I ended up having to take the back off again while the tablet was powered on after I replaced my battery because the screen wasnt working. I checked each cable and that first one was the one that controlled touch. My Nex10 is working as smoothly as it did when I first got it.

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