Question about hardware Issues - Xiaomi Redmi 4 Prime Questions & Answers

Hello guys. I'm currently planning to change my phone to this Redmi 4 Prime (markw). Coming from ido, I came to notice that there is several hardware issues with Xiaomi phones, one glaring flaw in fact, in that whenever I'm charging the phone, either from a wall adapter or a computer USB, there seems to be ranaway voltage that messed up the touchscreen. Normally unplugged, the screen worked fine as it should be, but as soon as it's plugged touch started going haywire and I've confirmed this with a screen draw app from the playstore, where it used to be a straight line whenever I glide my finger on the screen (unplugged phone) to sudden dots or combination of short lines resembling morse codes whenever I plugged and charge the phone.
Idos seems to have this issue confirmed. A friend got a Redmi Note 2 and it didn't happen on his unit, so I don't think it's a norm on Xiaomi devices. I've searched this subforum but nobody seemed to have mentioned the issue.
I'd like your help if this sort of thing also happen to markw.
edit: thanks in advance.

natekoh said:
Hello guys. I'm currently planning to change my phone to this Redmi 4 Prime (markw). Coming from ido, I came to notice that there is several hardware issues with Xiaomi phones, one glaring flaw in fact, in that whenever I'm charging the phone, either from a wall adapter or a computer USB, there seems to be ranaway voltage that messed up the touchscreen. Normally unplugged, the screen worked fine as it should be, but as soon as it's plugged touch started going haywire and I've confirmed this with a screen draw app from the playstore, where it used to be a straight line whenever I glide my finger on the screen (unplugged phone) to sudden dots or combination of short lines resembling morse codes whenever I plugged and charge the phone.
Idos seems to have this issue confirmed. A friend got a Redmi Note 2 and it didn't happen on his unit, so I don't think it's a norm on Xiaomi devices. I've searched this subforum but nobody seemed to have mentioned the issue.
I'd like your help if this sort of thing also happen to markw.
edit: thanks in advance.
Click to expand...
Click to collapse
This problem it's not only on Xiaomi Phones, i had the same issue on my old LG L Bello and Galaxy S2
Markw haven't this problem
Sent from my markw using XDA Labs

Poor/damaged charger. It's not phone fault.

I never had problems like this, and I charge it with an Ikea wireless charger (using the USB port), an Aukey triple wall charger, my ThinkPad T430, and my desktop PC. Though, I used to have this issue on my Motorola Droid RAZR. It's both charger's fault, or in the case of the RAZR, an uncommonly high amount of amperes (I used 2.1A chargers when the standard was 1A)

Related

Oh no. Screen calibration issue.

So my main complaint about the nexus 1 was the crazy digitizer. I am sitting here playing pocket legends and all of a sudden my screen starts going crazy just like on the nexus 1. I ran screen test toolkit and on the trace test i got sharp vertical lines that shot out from where my finger was tracing. I did have the phone plugged in at the time and since unplugging it seems to have gone away but the is reason enough to concern. Anyone else had this issue? May just take my phone back and get a replacement just in case.
Update: as much as I feel like a bonehead for admitting this I found the culprit. Apparently the charger i was using is not playing nice with the nexus s. It is the same charger i use for my nexus 1 an apparently it has a different power output that the nexus s doesn't like very much. Hope my mistake will help others.
I tried charging over USB at a friend's house on his dinosaur iMac, the screen started acting completely screwy as well.
this is really an intresting behavior. i didnt know a scren could do such a thing in different charger.. . live and learn
yea, why does this do this? I wonder can it be fixed with software
Why would you even try to charge it with something else since a wall charger came with it.
Because you can charge an Android phone via USB cable?
That's I think an official feature of Android.
And it MUST WORK WELL!
If not, then it is a bug in the software or hardware
I read a lot about this reports, anyone post into Google official forum?
tominater12 said:
Why would you even try to charge it with something else since a wall charger came with it.
Click to expand...
Click to collapse
it happens when I charge on both
Darrien13 said:
it happens when I charge on both
Click to expand...
Click to collapse
i think you need to check other phones. as far as i know charging from usb less amp than the wall. so it shouldnt show any weird calibration issues or flicker. double check man
ll_l_x_l_ll said:
i think you need to check other phones. as far as i know charging from usb less amp than the wall. so it shouldnt show any weird calibration issues or flicker. double check man
Click to expand...
Click to collapse
Yes, max amp from USB is 0.5A. Typical output for smartphone chargers is 1A. But this shouldnt be a problem, and also less amp means longer batterylife on the long run cause it doesnt stresses battery as much.
Sent from my Nexus One using XDA App
I think it's because the touchscreen on the NS seems to be more sensitive than most phones (I can get it to register input without even touching the screen sometimes) that it gets disrupted by other sources of electrical conductivity... such as the charger. Mine is ok, never really tried with the charger plugged in though. I ran multitouch visible test and I was satisfied with the tracking, it's the same if not better than the Vibrant's, which can handle 5 simultaneous inputs.

Fixing Galaxy Note problems

Hey guys, I created this thread to chronicle my attempt in fixing my Galaxy Note's broken USB dock connector.
The problem: The phone charges only when off. MTP/USB mass storage won't work. On some roms Car mode wackiness ensued. It seemed like it was possessed; exactly like another persons detail of the problem.
Attempt to fix it: Contacted three wholesalers in China at Alibaba.com for the dock connector for Galaxy Note. Waiting on response right now.
So far I have eleminated everything in my troubleshooting. I've tried multiple custom roms and went and tried two different stock roms with no luck. I also have tried plugging in different kinds of usb cables. I also tried plugging them in different computers.
Anyone can post they're problem-->solution here for future reference.
I found this on google and I thought it was very helpful. HERE IS THE SERVICE MANUAL FOR GALAXY NOTE:
http://letitbit.net/download/55297....68026c2/Samsung_N7000_Service_Manual.rar.html
http://www.samsungparts.ru/2012/01/%D1%80%D0%B0%D0%B7%D0%B1%D0%BE%D1%80%D0%BA%D0%B0-samsung-gt-n7000/#more-2963
andruyd said:
Hey guys, I'm created this thread to chronicle my attempt in fixing my Galaxy Note's broken USB dock connector.
The problem: The phone charges only when off. MTP/USB mass storage won't work. On some roms Car mode wackiness ensued. It seemed like it was possessed; exactly like another persons detail of the problem.
Attempt to fix it: Contacted three wholesalers in China at Alibaba.com for the dock connector for Galaxy Note. Waiting on response right now.
So far I have eleminated everything in my troubleshooting. I've tried multiple custom roms and went and tried two different stock roms with no luck. I also have tried plugging in different kinds of usb cables. I also tried plugging them in different computers.
Anyone can post they're problem-->solution here for future reference.
Click to expand...
Click to collapse
I am afraid there is no solution for this type of behavior at this point. I am too had the same experience.
I am awaiting for another responds email from Germany(where my Note came from) to send mine in for a repair. Until then, I can still use my Note with external battery/charger that I got from Amazon.
good luck-
Are guys plugging the cord in upside down or something? Ive had galaxy s, sgs2 and now note since release day and havent experienced this issue.
GALAXY NOTE
Did you guys try use difference charger? I face the same problem once where the charging mode keep changing to dock mode on and off while charging. After i change it use others charger (spare), now everything is ok.
My theory is that the charger started to malfunction n produce too low or too high voltage which trigger the dock mode..my 2 cents.. ;P correct me if im wrong..
Sent from my GT-N7000 using XDA App
naimmkassim said:
Did you guys try use difference charger? I face the same problem once where the charging mode keep changing to dock mode on and off while charging. After i change it use others charger (spare), now everything is ok.
My theory is that the charger started to malfunction n produce too low or too high voltage which trigger the dock mode..my 2 cents.. ;P correct me if im wrong..
Sent from my GT-N7000 using XDA App
Click to expand...
Click to collapse
I can assure you it's not the charger or the data cable, as I have plenty laying around. My money is on the logic board.
naimmkassim said:
Did you guys try use difference charger? I face the same problem once where the charging mode keep changing to dock mode on and off while charging. After i change it use others charger (spare), now everything is ok.
My theory is that the charger started to malfunction n produce too low or too high voltage which trigger the dock mode..my 2 cents.. ;P correct me if im wrong..
Sent from my GT-N7000 using XDA App
Click to expand...
Click to collapse
After having 2 SGNote units being bricked and (luckily) replaced with a new unit everytime, I found that the root cause for the SGNote being bricked is a weak USB interface and protection circuit. At first I thought I just messed up the rooting process that's why I bricked the device. When my 2nd replacement unit also got bricked, I traced back that the only common denominator was a rogue iphone charger that I used to recharge the device. Knowing that the weakness of the SGNote is the USB circuit, I'm now careful to use no other charger but the stock charger that came with the unit.
wolfmanx said:
After having 2 SGNote units being bricked and (luckily) replaced with a new unit everytime, I found that the root cause for the SGNote being bricked is a weak USB interface and protection circuit. At first I thought I just messed up the rooting process that's why I bricked the device. When my 2nd replacement unit also got bricked, I traced back that the only common denominator was a rouge iphone charger that I used to recharge the device. Knowing that the weakness of the SGNote is the USB circuit, I'm now careful to use no other charger but the stock charger that came with the unit.
Click to expand...
Click to collapse
Yeah this makes sense.
Anyway this is the part I'm trying to acquire:
http://www.alibaba.com/product-gs/521953864/Dock_Connector_Charging_Port_Flex_Cable.html
http://www.alibaba.com/product-gs/521398121/For_Sansung_GALAXY_NOTE_N7000_I9220.html
http://www.alibaba.com/product-gs/521398854/I9220_charger_flex_for_Samung.html
I strongly believe that the Galaxy S2 USB problems are of similar nature and the solution was to replace the USB dock connector. This gives me a lot of hope since it's easy enough to do. There is no soldering involved AFAIK since it just came off during the Galaxy Note teardown video on youtube @2:28 and @3:36 (ttp://www.youtube.com/watch?v=UFDr3PQMTxw). Correct me if I'm wrong.
its definitely a hardware issue and has been traced to the usb port inside the phone. I have the same issue and I am also waiting for the part to replace the damaged one inside my phone.
here is what I am doing to make my phone function-able:
When you connect the usb cord to charge the phone you have to press it down hard and then slide it out. this will temporarily fix the physical usb port pins and allow your phone to function normally. you have to do this every time when you connect and disconnect the usb cord. I will use my phone like this until the part becomes available to buy. I have a feeling, this phone is very delicately designed and can get bricked all by itself.
My note does not charge with Three of my HTC chargers neither does it charge with another car charger.but charges fine with the Samsung charger.has sometimes issues with otg with Samsung otg cable and another otg cable. Even today when I used a Samsung otg cable to connect my note with a Samsung galaxy s2 via a Samsung USB cable, the otg features did not work, the s2 just said mtp and note said unknown device connected! So there are issues with this USB on the note.
I saw a youtube video for Galaxy S2 where he suspected that it was a malfunctioning USB dock. He replaced it and all the symptoms were gone. I'm really going full press on this and hopefully I can help myself and others who have similar problems. I've read up on USB problems the last 2 days from Galaxy Note users and Galaxy S2. They are very similar in design other than the screen/stylus.
bannork said:
I am afraid there is no solution for this type of behavior at this point. I am too had the same experience.
I am awaiting for another responds email from Germany(where my Note came from) to send mine in for a repair. Until then, I can still use my Note with external battery/charger that I got from Amazon.
good luck-
Click to expand...
Click to collapse
Please keep us updated on your progress.
BTW to the folks having USB issues, are you having unusual battery drain? What other quirks have you encountered?
Has anyone compared the shape of the USB dock connector for Galaxy S, Galaxy S2, Galaxy Nexus and Galaxy Note? I wonder if they are all the same shape and if I should try and look at replacing that part only? If it is the same then I will get this http://cnn.cn/shop/samsung-i9000-galaxy-microusb-connector-p-10745.html since it's cheap and I've got nothing to lose if it doesn't work.
Looks like we have a new design flaw here..so, how long does it take for you guys to experience this problem from date purchase your note?
Mine already 1 month purchase and not having this problem.
Sent from my GT-N7000 using XDA App
aftabbabar said:
its definitely a hardware issue and has been traced to the usb port inside the phone. I have the same issue and I am also waiting for the part to replace the damaged one inside my phone.
here is what I am doing to make my phone function-able:
When you connect the usb cord to charge the phone you have to press it down hard and then slide it out. this will temporarily fix the physical usb port pins and allow your phone to function normally. you have to do this every time when you connect and disconnect the usb cord. I will use my phone like this until the part becomes available to buy. I have a feeling, this phone is very delicately designed and can get bricked all by itself.
Click to expand...
Click to collapse
I fully agree that it is a hardware issue. Samsung should come up with an extra dongle or maybe a protection circuit integrated with the USB cable that should be used in conjunction with the SGNote. Otherwise, this issue will just keep on repeating and they will end up with a bunch of bricked units on their hands.
If only I didn't like the display on this device, I would have opted for a change item instead of a replacement unit.
I still have the rogue iPhone charger and when I use it to charge an iPhone it keeps on repeatedly bringing up the charging battery icon on and off but it doesn't destroy or brick the phone. But when I connected it to the SGNote, it bricked it. I did it on 2 units. And it will surely brick any other SGNote unit I connect this charger to. I'm willing to demo this to Samsung to prove the point of their weak USB interface circuitry.
wolfmanx said:
...
If only I didn't like the display on this device, I would have opted for a change item instead of a replacement unit.
I still have the rouge iPhone charger and when I use it to charge an iPhone it keeps on repeatedly bringing up the charging battery icon on and off but it doesn't destroy or brick the phone. But when I connected it to the SGNote, it bricked it. I did it on 2 units. And it will surely brick any other SGNote unit I connect this charger to. I'm willing to demo this to Samsung to prove the point of their weak USB interface circuitry.
Click to expand...
Click to collapse
Like you I got the Note for the screen size because I don't like to read in small screens. I haven't had a phone in 6 years!!!! I've seen phones come and go. The screen size of the Note made it comfortable enough to read anything (PDF, comics, web pages, ebooks).
How sure are you guys that it is indeed the USB circuitry and not just the metal dock? To be honest I'm not sure right now.
andruyd said:
Like you I got the Note for the screen size because I don't like to read in small screens. I haven't had a phone in 6 years!!!! I've seen phones come and go. The screen size of the Note made it comfortable enough to read anything (PDF, comics, web pages, ebooks).
How sure are you guys that it is indeed the USB circuitry and not just the metal dock? To be honest I'm not sure right now.
Click to expand...
Click to collapse
Oh my! Looking at the charger flex assembly pictures, all I see are a bunch of passive components for protection. I see no active components on this board that would likely be used for over-voltage or over-current protection. I'm not sure if it's on the main board though. But normally protection circuitry are placed right next to the connector for them to be effective. There seems to be a lot of space on the board for even a single-chip USB protection circuit but the space hasn't been utilized for such.
I'd be willing to bet you that your problems will still be the same even after replacement of this flex assembly.
wolfmanx said:
Oh my! Looking at the charger flex assembly pictures, all I see are a bunch of passive components for protection. I see no active components on this board that would likely be used for over-voltage or over-current protection. I'm not sure if it's on the main board though. But normally protection circuitry are placed right next to the connector for them to be effective. There seems to be a lot of space on the board for even a single-chip USB protection circuit but the space hasn't been utilized for such.
I'd be willing to bet you that your problems will still be the same even after replacement of this flex assembly.
Click to expand...
Click to collapse
Well I hope you are wrong or else I'm screwed over an $800 phone. Did you see that in the Service Manual? I've linked the service manual on the first post. QME02 is the part I want to replace.
naimmkassim said:
Looks like we have a new design flaw here..so, how long does it take for you guys to experience this problem from date purchase your note?
Mine already 1 month purchase and not having this problem.
Sent from my GT-N7000 using XDA App
Click to expand...
Click to collapse
For me it was a month and a half before it started going crazy.
bannork said:
For me it was a month and a half before it started going crazy.
Click to expand...
Click to collapse
For me, about 5 minutes after I plug-in the rogue iPhone charger... I did it twice... and luckily, since I still have warranty, I got both units replaced.
I strongly suggest for everybody not to use any other USB charger apart from the stock charger that came with the SGNote. Of course, this excludes plugging it into a PC or laptop as they should be fairly safe and well-protected (at least for name-brand units).
If you're going to use the stock charger, I would recommend plugging the USB cable in the charger and plugging-in the charger in the wall socket first BEFORE plugging-in the mini-USB connector to your SGNote. This minimizes the chances of having voltage spikes being transmitted through the USB connections into the SGNote, especially during the actual plugging of the charger to the wall socket. This is to be on the safe side in the case that the stock charger design is also flawed and doesn't prevent transients from reaching the load unit itself.
Is there a website or something from which we can call Samsung's attention on this matter? If indeed transients are the cause of the USB problems then all they need to do on the SGNote is to redesign the USB board assembly and stick it into units that have not been affected yet. This entails a product recall or as I mentioned in my previous post, maybe to offer us SGNote buyers a dongle or a USB cable with the protection circuitry.
---------- Post added at 11:05 PM ---------- Previous post was at 10:53 PM ----------
andruyd said:
Well I hope you are wrong or else I'm screwed over an $800 phone. Did you see that in the Service Manual? I've linked the service manual on the first post. QME02 is the part I want to replace.
Click to expand...
Click to collapse
Yup on the service manual and on the links to alibaba that you provided on your previous posts. I looked at both sides of the sub-assembly and only found passive components.
Well I'm using a 2 amp charger from ebay for charging downstairs; a HTC 1 amp charger in the bedroom; the 1 amp Samsung charger in work, but I also plug it into the 800 mah charger that also charges an extra battery in situ. ... she's till working fine.
Right now, usb mass storage or MTP is totally non-functional for me. I'm still glad USB charging is working. I hope that parts holds up till I get a replacement for it.
Thank goodness for wireless and FTP!

Galaxy S5 wireless charging issue

Hey all,
I got the galaxy s5 about a month ago and went online and picked up a generic wireless receiver and charging pad. Every time I put the phone on to charge I would get a charge and then disconnect and it would keep doing that. Well I thought ill just get the official Samsung galaxy s5 wireless cover and went online found some good reviews of a tiled qi wireless charging pad. I got it all today and same thing. Move it around and still unable to get it to work. Tired multiple usb cords and still nothing. Only thing left to try is to get the Samsung charging pad. Anybody have any ideas?
Sent from my SAMSUNG-SM-G900A using XDA Free mobile app
I had issues with low cost eBay Chinese charger pad, just the same symptoms as you describe. No issues with the Nokia or Samsung Charging pads though.
Currently rocking the Samsung OEM Charging back with the Nokia FatBoy Charging pad without any issues.
It worked
timeToy said:
I had issues with low cost eBay Chinese charger pad, just the same symptoms as you describe. No issues with the Nokia or Samsung Charging pads though.
Currently rocking the Samsung OEM Charging back with the Nokia FatBoy Charging pad without any issues.
Click to expand...
Click to collapse
Thanks that did it. Went and got a Nokia charging pad at Verizon and works like a charm. I'm never lucky enough to get the cheap ones to work!
Fix for low cost chargers
timeToy said:
I had issues with low cost eBay Chinese charger pad, just the same symptoms as you describe. No issues with the Nokia or Samsung Charging pads though.
Currently rocking the Samsung OEM Charging back with the Nokia FatBoy Charging pad without any issues.
Click to expand...
Click to collapse
Found another solution for low cost chargers
- remove the top cover and put your phone directly on the transmitter coil ->> the problem was resolved
i too am having a charging issue at 35% wtf gives really

New charging port. No rapid charge

Phone used to say rapid or fast charge when charging but my charging port wouldn't"snap" the connector in place so it contestants fell loose. So last night I changed the daughter board/charging port out with a genuine Huawei one for this phone. But now I never get rapid or fast charge. Only "slow charge" and "charging". I used to run pure Nexus all the time and recently went over to Resurrection remix. Maybe it's the different ROMs showing different charging status's.. I'm not sure. But here's a screen shot of ampere. Any ideas?
r1nstang said:
Phone used to say rapid or fast charge when charging but my charging port wouldn't"snap" the connector in place so it contestants fell loose. So last night I changed the daughter board/charging port out with a genuine Huawei one for this phone. But now I never get rapid or fast charge. Only "slow charge" and "charging". I used to run pure Nexus all the time and recently went over to Resurrection remix. Maybe it's the different ROMs showing different charging status's.. I'm not sure. But here's a screen shot of ampere. Any ideas?
Click to expand...
Click to collapse
Hello,
Searching for slow charging in Q&A search box: https://forum.xda-developers.com/search/forum/4746?query=Slow charging
Led me here: https://forum.xda-developers.com/nexus-6p/help/slow-charging-7-1-2-t3594207
Don't know if it's related, but others on RR 7.1.2 seem to have issues with rapid charging.
Good luck...
Thank you. I kept trying to search for rapid charge voltage or anything like that to see what numbers I should be getting in ampere but not had any luck. Guess I'll flash a different rom next weekend and see if that is it.
Thanks
r1nstang said:
Phone used to say rapid or fast charge when charging but my charging port wouldn't"snap" the connector in place so it contestants fell loose. So last night I changed the daughter board/charging port out with a genuine Huawei one for this phone. But now I never get rapid or fast charge. Only "slow charge" and "charging". I used to run pure Nexus all the time and recently went over to Resurrection remix. Maybe it's the different ROMs showing different charging status's.. I'm not sure. But here's a screen shot of ampere. Any ideas?
Click to expand...
Click to collapse
Did you resolve this issue? I bought a new charging port / daughter board for my Nexus 6p from DIYMobileRepair and had the same issue. I messaged a different vendor (Fixez) asking about their parts and they told me "Our replacement parts will have some issue with data transfer it will charge slowly as well. These are unfortunately known issues with the replacement parts."
Has anyone found a Nexus 6p replacement daughter board that is fully functional?
boardwak said:
Did you resolve this issue? I bought a new charging port / daughter board for my Nexus 6p from DIYMobileRepair and had the same issue. I messaged a different vendor (Fixez) asking about their parts and they told me "Our replacement parts will have some issue with data transfer it will charge slowly as well. These are unfortunately known issuesx with the replacement parts."
Has anyone found a Nexus 6p replacement daughter board that is fully functional?
Click to expand...
Click to collapse
Unfortunately no. I've tried 2 boards available online that claim to be OEM but neither worked. Luckily I got my money back on both. I did just order a used board that's pulled from a working Nexus 6p. So hopefully that along with the new battery I ordered fixes this useless phone. I was about to keep on of the boards that I ordered before and have it in my phone strictly for charging purposes. When the new pixel is released I may pick one of them up but I wanna be able to get the pictures of vacation and of my wife of my phone and I haven't had luck finding an app that can transfer pics from the phone to a PC over WiFi.. Only from PC to phone. And the Bluetooth on this phone is so retardedly slow to transfer 1 picture thru Bluetooth to my laptop takes 2-3 minutes.

Dash Charging not working

Hi Guys,
Today in the morning Dash charging worked fine but when i suddenly kept on charge in night..blue light doesnt come for dash charging. I also checked using *#808* and fast charger says no. What to do? I tried 2 different original chargers.
ronak123456 said:
Hi Guys,
Today in the morning Dash charging worked fine but when i suddenly kept on charge in night..blue light doesnt come for dash charging. I also checked using *#808* and fast charger says no. What to do? I tried 2 different original chargers.
Click to expand...
Click to collapse
This started happening to me and I ended up having to replace the charging port. The part is cheap. Getting the back off was a challenge.
Sent from my ONEPLUS A5000 using Tapatalk
Cleaning the port may be also usefull. I had the same problem but after cleaning with a 0.4mm drill i get a lot of fibers out of the port. And after that it worked like a charm
That worked for mine a couple times and in the end it didn't anymore. I'm going to give the phone the benefit of the doubt and assume that dirt getting into the port from my vest pockets (I work outside every day doing land surveying) wore out the port early. I have however never worn out a micro USB port on any of my previous phones under the same conditions.
Luckily the port was cheap and I did the battery at the same time. Unfortunately I had to have a cell phone repair shop get the phone open for me. The clamped in screen is much harder to remove than the glued in ones on an iPhone.

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