Mi 4c magnet effects - Xiaomi Mi 4C

So I was doing some VR with my Xiaomi Mi 4c and my viewer doesn't have a magnet, so I used a small fridge magnet (for input) instead. All good until I waved it near the bottom end of the phone when the screen blinked out, returning to normal as soon as I moved the magnet away. I'm unsure what's happening here and wanted to know if I might have/be causing damage to the device.
Many thanks

Don't put magnets near electronic devices. You can damage them.

Benjamin_Mac said:
So I was doing some VR with my Xiaomi Mi 4c and my viewer doesn't have a magnet, so I used a small fridge magnet (for input) instead. All good until I waved it near the bottom end of the phone when the screen blinked out, returning to normal as soon as I moved the magnet away. I'm unsure what's happening here and wanted to know if I might have/be causing damage to the device.
Many thanks
Click to expand...
Click to collapse
I think it's normal, this is for some magnetic flip covers in order to turn the screen on and off. Usually the sensor is located at the bottom of the phone.

Ydraulikos said:
I think it's normal, this is for some magnetic flip covers in order to turn the screen on and off. Usually the sensor is located at the bottom of the phone.
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Click to collapse
Cool, I thought that might be something to do with it. Thanks

Related

Screen turns off when the flip cover opens full

Hello,
i bought a flip cover for my Galaxy Note 8.0.
When i open it, the screen goes on as expected. However when is turned all the way to the back of the Note, the screen goes off!
It seems that also the back camera has a sensor and understands when i do this the screen should turn off.
Any suggestions to fix this?
is this and official case? if not then i'd suspect either you have one with too strong a magnet, an unshielded magnet or both.
madsquabbles said:
is this and official case? if not then i'd suspect either you have one with too strong a magnet, an unshielded magnet or both.
Click to expand...
Click to collapse
hello,
no it is not the official case, so probably this is what you indicated.
Is there a way to stop the tablet from recognizing the case totally?
so far the only way is to cut out the magnet until someone figures out how to disable it. you'll most likely need root to do so.
madsquabbles said:
so far the only way is to cut out the magnet until someone figures out how to disable it. you'll most likely need root to do so.
Click to expand...
Click to collapse
thanks, any idea where exactly is this magnet?
i believe it's inside near where the case meets the edge of the device. run a magnet around it to verify the exact spot.

[Q] N5 Random Shut Downs After Screen Replacement

So I ended up cracking my screen and installed a replacement last night. Everything seemed fine but I noticed, after putting it back together, that any slight bit of pressure or shock to the top causes my N5 to shut off.
I took it apart again to make sure all of the ribbons were properly connected and to take a second look and everything appears fine. I didn't have this problem prior to the replacement and I was very gentle during the tear down and reassembly so I don't the the CPU or anything on it is damaged. Other than the top being hyper sensitive the phone works perfectly.
Any ideas on what the problem is or could be?
SOLVED(sorry, I don't know how to change the title)
I just wanted to fill in anyone curious or running into this problem in the future on how I resolved the issue.
So after some time I narrowed the problem down to the second back cover (the one with the camera lens and beneath the Nexus branded cover) making contact with the motherboard. More specifically, compressing the power management IC with its aluminum cover. You want to make sure that chip is laid flush which was a PITA, for me at least, because the headphone jack and earpiece speaker wants to push it up and out. What I did was put the jack in, lay the board on top, then gradually adjusted the jack with tweezers while gently pushing the motherboard down until the board was flush, then placing the earpiece speaker in.
I then placed the second back cover on and tightened the screws until I could feel them just slightly putting pressure on the cover. I can't stress how light this pressure is as it is the key in resolving this issue. To compare it to changing your oil filter on your car; when you can feel the filter make solid contact with the block and you then turn it about another half turn to seal it; it's like that but without that half turn.
Anyway, I hope this helps anyone else unfortunate enough to both break their screen and then have their phone randomly shut down when any pressure is applied after fixing it.
hello
TCGUK said:
So I ended up cracking my screen and installed a replacement last night. Everything seemed fine but I noticed, after putting it back together, that any slight bit of pressure or shock to the top causes my N5 to shut off.
I took it apart again to make sure all of the ribbons were properly connected and to take a second look and everything appears fine. I didn't have this problem prior to the replacement and I was very gentle during the tear down and reassembly so I don't the the CPU or anything on it is damaged. Other than the top being hyper sensitive the phone works perfectly.
Any ideas on what the problem is or could be?
Click to expand...
Click to collapse
hello where didu buy the screen for your new n5 ? there is any king of intrusion to do it .
thank:good:
josedecuba said:
hello where didu buy the screen for your new n5 ? there is any king of intrusion to do it .
thank:good:
Click to expand...
Click to collapse
I bought mine off of eBay and it cost me $150. I could be wrong but it looked like the screen can't be separated from the frame. You might want to keep that in mind when purchasing because there are sellers that sell the screen without a frame. Tearing down the N5 was pretty simple. The hardest part for me was getting the back cover off as there are 4 (two on each side) large clips. If you end up bending the clips any, you can push them back to shape to keep the back from creaking like every Samsung I've ever owned. There's a nice guide on iFixit if you want to look at the process prior to ordering a new part.
I've read from others that you can send your phone into LG and they'll repair the screen for you. When you send it in they'll email a quote to you within a day. The price I keep seeing is $146 and I have no idea what the turn around on that is.

Screen won't turn on, thus stays black during call.

Hey, when i receive and accept a call, my screen immediately turns off. Like it should when i put my ear up to it. But during the call i cant do anything to get the screen to turn on. After the call i have to press the lock button and unlock it again to get it on.
1) bootloader unlocked
2) custom kernel?
3) stock ROM?
4) rooted?
6) What version of the OS are you on? MM 6.0.1 / .511
7) This is recent, tried with 2 different roms so it isnt rom reliant i guess.
8) When in service menu and testing the light sensor it responds on my hand covering the sensor so i don't think its faulty.
J03llV said:
Hey, when i receive and accept a call, my screen immediately turns off. Like it should when i put my ear up to it. But during the call i cant do anything to get the screen to turn on. After the call i have to press the lock button and unlock it again to get it on.
1) bootloader unlocked
2) custom kernel?
3) stock ROM?
4) rooted?
6) What version of the OS are you on? MM 6.0.1 / .511
7) This is recent, tried with 2 different roms so it isnt rom reliant i guess.
8) When in service menu and testing the light sensor it responds on my hand covering the sensor so i don't think its faulty.
Click to expand...
Click to collapse
Clean your screen protector, if you have plastic protector REMOVE the screen protector.
Flash FTF with all WIPE options selected..
sceryavuz said:
Clean your screen protector, if you have plastic protector REMOVE the screen protector.
Flash FTF with all WIPE options selected..
Click to expand...
Click to collapse
I have tempered glass with a cutout for the sensor though..
J03llV said:
I have tempered glass with a cutout for the sensor though..
Click to expand...
Click to collapse
Mostly, screen protector cause that. Second sensors might be broken. Software is the last thing (if comes with stock)..
Go to *#*#7378423#*#* service test and go to proximity sensor, if it stays "ON" something is wrong with the proximity sensor, if you are absolutely 100% sure nothing is blocking your sensor, have you ever changed your display assembly? try pressing down around the top right of screen with a little force, both front and back if it switched to "OFF" when you press your screen there's a slight gap between your motherboard and front glass.
webslasher said:
Go to *#*#7378423#*#* service test and go to proximity sensor, if it stays "ON" something is wrong with the proximity sensor, if you are absolutely 100% sure nothing is blocking your sensor, have you ever changed your display assembly? try pressing down around the top right of screen with a little force, both front and back if it switched to "OFF" when you press your screen there's a slight gap between your motherboard and front glass.
Click to expand...
Click to collapse
Holy this is it. I had to get my front glass replaced because it was shattered, when i press the screen it turns off, when i block the sensor it goes back to on again until i press on the screen. Also my vibrator motor seems to not function properly since, it sometimes doesnt vibrate at all, and sometimes with very little feedback. Could this also be a result of the replacement?
J03llV said:
Holy this is it. I had to get my front glass replaced because it was shattered, when i press the screen it turns off, when i block the sensor it goes back to on again until i press on the screen. Also my vibrator motor seems to not function properly since, it sometimes doesnt vibrate at all, and sometimes with very little feedback. Could this also be a result of the replacement?
Click to expand...
Click to collapse
It could be the glue is not settling in correctly and adds very little gap than original one, did you replace the screen yourself? Mine showed this behavior I then reheat the edges of the screen with hair dryer then put pressure around the screen with those black paper clips, reheat it again then let it cool for about 2 hours.
I'm not entirely sure about the vibrator motor
webslasher said:
It could be the glue is not settling in correctly and adds very little gap than original one, did you replace the screen yourself? Mine showed this behavior I then reheat the edges of the screen with hair dryer then put pressure around the screen with those black paper clips, reheat it again then let it cool for about 2 hours.
I'm not entirely sure about the vibrator motor
Click to expand...
Click to collapse
No, I had it done by a company in phone repairs. But i kinda regret fixing it instead of buying a new phone tbh..
J03llV said:
No, I had it done by a company in phone repairs. But i kinda regret fixing it instead of buying a new phone tbh..
Click to expand...
Click to collapse
I bought this phone second hand and it had this issue, What I did was hair dryer and paperclip. and ..... try a more ghetto solution, which involves opening the back door, put some foam and double tape it near the camera module, there's an empty space. Make sure it presses the motherboard but not too hard or it will compromise the waterproof glue holding the back cover.
I took a picture of what I did to fix my issue
http://imgur.com/a/5bwuN
webslasher said:
I bought this phone second hand and it had this issue, What I did was hair dryer and paperclip. and ..... try a more ghetto solution, which involves opening the back door, put some foam and double tape it near the camera module, there's an empty space. Make sure it presses the motherboard but not too hard or it will compromise the waterproof glue holding the back cover.
I took a picture of what I did to fix my issue
http://imgur.com/a/5bwuN
Click to expand...
Click to collapse
I'm not going to try that lol, i'm sure I will **** it up big time.. Im going to email the company trying to get something happen..
I had that issue, but since I run custom ROM such as SlimX no more black screen don't know why ?
Just for info is someone has this problem, i had small skin flake on the sensor hahahha.

Nokia 5 flip case that works with hall sensor

The other thread seems be more about non-flip cases.
Has anybody succeeded in finding a flip case that uses the hall sensor. I am talking about cases that typically have a small round magnet somewhere that activate the hall sensor. This turns on and turns off the display automatically (on flip open/close).
I bought one off amazon: https://www.amazon.in/gp/product/B074M9RHZV/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
The case is OK. But, it does not trigger the hall sensor.
I tried taking a small magnet near the phone, around the bezel. No reaction from the phone. How is the hall sensor on this phone supposed to work ? Asus phones dont need any special activation for this. Samsung needed their special cover that has a chip (galaxy S5). Is something else needed to turn on the hall sensor ?
I emailed HMD global support and got the following link: https://www.nokia.com/en_in/phones/nokia-slim-flip-cover?selectedDevice=
A flip case is listed here for Nokia 5. Has anyone tried it/has any experience with this ?
Thanks.
Answering my own question. I could not find out an accessory that supports the hall sensor. But, did manage to find out where the hall sensor is!
The hall sensor is somewhere near the middle of the screen. On your lock screen, it is around the place that displaces the day of the week (Monday, etc). Strange place to have a hall sensor. But it works! Just try taking a magnet near this spot.
I guess, now I have to find a flat sticky magnet to stick on my flip cover
So, did you found some nice magnet? I have original Nokia slim flip case which doesnt have the magnet, i tried what you said and it works with normal magnet, but it it is too thick. It doesnt work with fridger stickers.
I also have slim neomdyum magnet, but i am affraid to try it.
AIPHEE said:
So, did you found some nice magnet? I have original Nokia slim flip case which doesnt have the magnet, i tried what you said and it works with normal magnet, but it it is too thick. It doesnt work with fridger stickers.
I also have slim neomdyum magnet, but i am affraid to try it.
Click to expand...
Click to collapse
I think the neomdymium magnet should be OK. I know that my previous asus's filp cover had a small (1/2 to 3/4 cm dia) neomdymium magnet. I would be more worried about the magnet hitting the screen when you close (not the power of the magnet itself). I also checked that a simple stick-on magnetic strip does _not_ work.
I made it work nicely! found a great thin magnet in notebook HDD, which o broke in half (about .2cm long and wide now) and then inserted it with ducktape in top of card pocket. Working flawlessly!
Edit: Just compass seems messed when magnet is near.
Ah, I was expecting it to be near the edge somewhere. I'll give this a go as I have a cheap flip case on mine. Does the magnet need to be quite strong? I have some sticky sheet magnets, so I'll maybe try one of them and see what happens.
Magnetic Tape - rather those which can be used to hang metallic tools on a wall than audiotape!! - works also perfectly: no worries about scratching the screen. Can easily be cut to proper size and maybe inserted seamlessly into any flip cover. Search for "magnetic tape roll"

Why does Honor 8 screen freezes when I put the phone on a magnet bracket in the car?

Hi everybody.
I have mounted a bracket in my car so I can use my Honor 8 handsfree in the car. On the back of the phone I have glued a thin piece of magnet. A magnet on the bracket is also mounted. When I put the phone on the magnet, the screen freezes. The screen has been locked.
When the display goes out, I can unlock it with the fingerprint reader on the back but the screen is still locked.
Why is this and how can I unlock the phone so I can make a call?
When I remove the phone away from the bracket and the magnet, I can use the screen again.
solgaard said:
Hi everybody.
I have mounted a bracket in my car so I can use my Honor 8 handsfree in the car. On the back of the phone I have glued a thin piece of magnet. A magnet on the bracket is also mounted. When I put the phone on the magnet, the screen freezes. The screen has been locked.
When the display goes out, I can unlock it with the fingerprint reader on the back but the screen is still locked.
Why is this and how can I unlock the phone so I can make a call?
When I remove the phone away from the bracket and the magnet, I can use the screen again.
Click to expand...
Click to collapse
Hi,
I might have an idea what causes your problem.
The honor 8 has support for flip covers with a little window.
The way the phone notices wether the cover is closed or open is via a little magnet inside the case.
So whenever you put the phone on the magnet it probably thinks you got a flip cover and you just closed it, which locks the phone.
Try going to your phone settings --> smart assistance --> Smart-Cover --> Turn it off.
Hopefully that fixes your problem.
- Dany
JasonDanielZz said:
Hi,
I might have an idea what causes your problem.
The honor 8 has support for flip covers with a little window.
The way the phone notices wether the cover is closed or open is via a little magnet inside the case.
So whenever you put the phone on the magnet it probably thinks you got a flip cover and you just closed it, which locks the phone.
Try going to your phone settings --> smart assistance --> Smart-Cover --> Turn it off.
Hopefully that fixes your problem.
- Dany
Click to expand...
Click to collapse
Thank you very much, Dany.
Your solution did fix the problem :good:
solgaard said:
Thank you very much, Dany.
Your solution did fix the problem :good:
Click to expand...
Click to collapse
No problem, glad I could help
It could be due to the fact that the magnet used in the bracket mount is very powerful. Which interferes with the electronics on your device.

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