Hi.
Some days ago my phone dropped from about 2m/6ft high. It was wearing a carbon fiber shell. There was no physical damage on the outside.
Since then, the phone randomly powers-off. Sometime takes some minutes, some time it does not pass through the Mi logo screen on boot.
Another issue it shows is with the videos. Any video shows only a green screen (like a chroma) with big pixel artifacts from time to time (like there is a decompression error). This happens with every video (youtube, minimized-youtube, image-in-image, instagram...). It even happens with the charging animation when I connect the power: full green screen with the percentage on it.
I managed to keep it powered on, more or less stable, by setting a plastic clamp on the upper-left corner of the screen (like where the camera is placed, but on the other side). That pressure seems to keep whatever is broken in place. I've managed to replace the clamp with some paper layers in the shell, so when the shell is set they make pressure on the back-cover and keep the phone on.
Any one has had a similar experience? Is that a soldering point broken or something like that? how could I repair it? reballing? Any one knows any service center in France/Belgium/Spain which is reliable (and won't cost me more than the value of the phone)?
Thanks in advance!
It might be a dislodged ribbon cable connector.
Otherwise a damaged display an/or mobo.
The SOC and other BGS form factor chipsets are suspectable to damage by board flexing and high G impacts.
A high G impact can internally damage chipsets as well. 6 feet is a lot...
blackhawk said:
It might be a dislodged ribbon cable connector.
Otherwise a damaged display an/or mobo.
The SOC and other BGS form factor chipsets are suspectable to damage by board flexing and high G impacts.
A high G impact can internally damage chipsets as well. 6 feet is a lot...
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Click to collapse
Thanks @blackhawk !
Related
I have a screen problem, and because of the cost would prefer to perform the repair myself. (I've repaired a number of laptops and smartphones in the past.) My problem is that I don't know which part failed.
The accident: I dropped my Galaxy S3 from a height of about 3 feet onto concrete. For reasons too embarrassing to detail, I didn't have the protective case on the phone.
The result: The front bezel around the screen has a 5mm abrasion scratch in it, but the screen itself shows no sign of damage at all. When I put the battery back in, and powered up the phone, the screen did not come on. I see a faint line of green pixels about 3cm long on one spot on the screen. There is nothing else on the display. The phone seems to be powering up and down (not entirely certain because I had the phone on silent mode before I dropped it).
I'm hoping that one of you with more experience might have an opinion on any fixes I might attempt, or tests I might run to determine what needs to be replaced.
Thank you very much for your suggestions!
Hello Good People,
Can someone please share some insight here. My issue is that every now and than my phone acts as if it is being controlled remotely. Home screens progress to the next screen, apps will open and close, widgets resize themselves or close, the notification pull down menu is goes up and down.
When this happens it all happens back to back within seconds and I cannot stop it. All I can do is do a hard reboot.
Any solution or tips as to what is going on? I have tried different ROMS and yet it has been known to happen again.
T.I.A.
Mine does it while charging and using the phone. Perhaps because of the lack of proper ground a charge builds up and starts "ghost click".
Its the expected reaction because the touch panel is a "capacitive" type. This model has support for a pen with stock rom. So there might be that the sensitive threshold is set too high to what is optimal when charging?
You can change this setting by editing a file. (that's for another day).
For me it can be minimized for a while by turning off the screen and swiping the whole palm over the screen and downwards. Like you give the charge to go somewhere with the largest possible surface area.
If I remember this right I can recall that SONY had a picture showing how the phone was designed.
It was made part of nylon, glassfiber and magnesium...
Nylon and copper is an excellent material that gain negative charge, aluminum and glass that can gain positive charge.
Magnesium mold is an alloy with part aluminium and other neat stuff.
ah found it:
http://blogs.sonymobile.com/2013/09...rlds-slimmest-full-hd-smartphone-infographic/
What I am saying is that the materials are there to create ghost clicks. Its not a hardware failure. I think it is only the interaction of the material the designers desided to use for this device.
SÜPERUSER said:
Mine does it while charging and using the phone. Perhaps because of the lack of proper ground a charge builds up and starts "ghost click".
Its the expected reaction because the touch panel is a "capacitive" type. This model has support for a pen with stock rom. So there might be that the sensitive threshold is set too high to what is optimal when charging?
You can change this setting by editing a file. (that's for another day).
For me it can be minimized for a while by turning off the screen and swiping the whole palm over the screen and downwards. Like you give the charge to go somewhere with the largest possible surface area.
If I remember this right I can recall that SONY had a picture showing how the phone was designed.
It was made part of nylon, glassfiber and magnesium...
Nylon and copper is an excellent material that gain negative charge, aluminum and glass that can gain positive charge.
Magnesium mold is an alloy with part aluminium and other neat stuff.
ah found it:
http://blogs.sonymobile.com/2013/09...rlds-slimmest-full-hd-smartphone-infographic/
What I am saying is that the materials are there to create ghost clicks. Its not a hardware failure. I think it is only the interaction of the material the designers desided to use for this device.
Click to expand...
Click to collapse
I would agree with you, I remember my phone used to have ghost touches with certain usb cables. Try a different cable if it is occurring while it is charging.
If not, do you have a screen guard on?
mofoahh said:
I would agree with you, I remember my phone used to have ghost touches with certain usb cables. Try a different cable if it is occurring while it is charging.
If not, do you have a screen guard on?
Click to expand...
Click to collapse
Any cable does the same thing. Received three SONY EC450 cables in the mail the other day.
The charger used today is a a bulk order of Samsung eta-p10x because of the removable plug so that I can put any longer C7 cable for long distance from the outlet. I do have a front+back glass panel.
It can be related to ghostclicks because I dropped the phone strait on the asphalt a month back. Luckely with a battery case taking the hit. But the glass is shattered. Two days after I replaced the glass..............
However ghost clicks have occured to and from during the three years time I have had this device. When charging.
Worth notice is that I have removed the asf sheet.
I am aware that the tempered glass isn't just recycled glass molded thin with a silicone residue on one side. There are metals and other possible conductive and charge holding ingredients mixed in the mass. Not to mention the most common sale argument: "HD clear visibility" what many sellers advertises their product to give you. This also has some fact in the paper...can't remember what they use for that at the moment. If it was a mineral or whatever.
Thank you SUPERUSER and mofoahh for the response.
Yes I do have a screen protector on the device. Weird that most of the time it happens when the usb cable is connected to the computer. I was getting freaked out as I thought someone might have been accessing my device remotely. I will get another charging cable.
Thank you again for the informative and technical insight, much appreciated!
You can check your touchscreen's responsiveness using an app called YAMTT:
https://play.google.com/store/apps/details?id=com.rn.yamtt
My phone has ghost or phantom touches all over the place.
PamelaGirl said:
Thank you SUPERUSER and mofoahh for the response.
Yes I do have a screen protector on the device. Weird that most of the time it happens when the usb cable is connected to the computer. I was getting freaked out as I thought someone might have been accessing my device remotely. I will get another charging cable.
Thank you again for the informative and technical insight, much appreciated!
Click to expand...
Click to collapse
If you are worried that someone is tapping your phone you can monitor the network with wireshark and dump a log every day. And use a keylogger. Or/and run catlog with dump at the end of every day.
Or to do this without any suspension from the hacker, run a man in the middle proxy to your computer. Have all traffic dumped there and you can review what's happening every now and then.
If you find anything suspicious then the first thing to look at when it comes to hacking is DNS servers. Google it.
electrical grounding issues.
change the charger.
tsiros said:
electrical grounding issues.
change the charger.
Click to expand...
Click to collapse
In general it is the recommended choice.
i spiled water on this phone and now i have black screen all other works and its vibrate when i touch the screen its just stay black
i did replace the lcd but no help can i fix this any how or just trow it and get new?
Has the device been completely flooded with water through the Usb charging port and the speakers?
And did you replaced hole lcd Unit with a complete new one (heating up the screen to melt the glue and so)?
Need a little more information...
Sometimes people are lucky and don't face problems in the future with the phones. But that depends mostly on the fact how much fluid was inside the device.
Normally when the phone was completely wet inside it's just a matter of time till you see issues starts. Because of the corrosion inside phones modules and boards.
So, long story short, my phone's battery had a sudden death. After I had it serviced by a 3rd party company, it came back with the screen somewhat damaged.
Here are some pictures for example, using the display service test:
I can't prove they did it because I simply couldn't turn the phone up until they replaced the battery. The battery might have leaked or something. They obviously didn't take the blame for it, but they also messed up the usb port so they are definitely a potential suspect. But, if they did it, what could be it? Looks like it got stained or wet or something... Definitely weird.
That kind of display issue is typically caused by a polarizer that is warped, usually caused by applying pressure to the display when it is hot. It's an all too easy thing for an inexperienced or careless repair person to do while the phone is face down on the bench, especially if they heat the entire device to loosen the seals, not just the back, or if they cool it down too quickly. It's even more common if the LCD itself is removed, but they should not have needed to do that to replace your battery. You may be able to improve it some by putting if face up, using a hair dryer to slowly heat the display a bit (not too close and moving continuously), and then letting it slowly cool down. If you have a screen saver installed, remove it first. You may be tempted to try and "work out" the warping. You are much more likely to make it worse if you try, so I don't recommend it. If you do nothing, it may slowly reduce on it's own as well.
Tiger Shark said:
That kind of display issue is typically caused by a polarizer that is warped, usually caused by applying pressure to the display when it is hot. It's an all too easy thing for an inexperienced or careless repair person to do while the phone is face down on the bench, especially if they heat the entire device to loosen the seals, not just the back, or if they cool it down too quickly. It's even more common if the LCD itself is removed, but they should not have needed to do that to replace your battery. You may be able to improve it some by putting if face up, using a hair dryer to slowly heat the display a bit (not too close and moving continuously), and then letting it slowly cool down. If you have a screen saver installed, remove it first. You may be tempted to try and "work out" the warping. You are much more likely to make it worse if you try, so I don't recommend it. If you do nothing, it may slowly reduce on it's own as well.
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Click to collapse
That might be the case. I can see the patterns shift a bit when I apply pressure to the screen. What is a way to confirm this? Could I do something with polarized sunglasses or something? If that is correct, the areas affected should darken/brighten differently from the rest of the screen.
I didn't try to mess with heating the screen up. Like you said, I might make it worse and I'm already really pissed about it. But I kinda want to try anyways. Where have you seen this before? Is it possible to fix it without opening the phone?
It's more common on tablets than phones, just because of size. I've seen it on screens that have been sat on but didn't break, but heat in combination with pressure is the more typical culprit. The sun or a hot car might do it if the heat was uneven, but I've not seen that. I'm not sure how you could confirm it. Maybe some sections will darken faster as a polarizer is rotated toward perpendicular to the polarized axis of the screen. Essentially, the glue layer between the polarizer and LCD panel is thinner in some places than others, so the polarizer is on a slight angle. In those areas, there is more polarization, and you see a darkness. The only real fix is to replace the screen assembly. The steps I gave will typically just help reduce, but never fully eliminate, the issue.
Unless they did a full, written inspection of the phone before you left it for repairs and you did a full inspection before walking out with it and noted the discrepancy then (which is always a good idea), your repair person is likely to continue to claim they did not do it.
The phone wasn't like that when the battery died. For obvious reasons, the screen couldn't be inspected before the company made the repairs. So I can't say it was their fault, although I'm pretty positive that it was. The suspicion is big because they also messed up the USB port pretty good. But, again, I can't prove it. It sucks because I wanted to sell the phone, and it was in pristine condition.
Hi guys. I've been working on a RN2 for a while now and something has been bothering me.
BACKGROUND
___
Basically, it was a side phone I kept in emergency but as you know siblings who can't keep stuff safe, I ended up lending it to him (after having it broken by my other sibling and having to change the screen) and he ALSO broke it, so I changed it again.
___
Now, my problem is the following:
When I was working on the screen, I noticed it wouldn't turn on again, so, after buying aforementioned screen, I placed it and it still didn't turn on. When I tried the heat measuring, I noticed it was heating around the area where you plug the flex cable (black cable with 2 identical plugs that connects the charge module (which I also changed) and the motherboard. The heat is on the side of the MB. I tried to switch the plug backwards but it doesn't work either (and doesn't fit as it is backwards). I bought another flex cable (Theseus' boat much) and it still heated up. So it finally comes to the fact that the issue is in the MB. (I guess ?) Thing is, I don't know what exactly. Does anyone have any idea?
Thanks in advance, I've been on this for a few months now (working it when I have time).
All you can do is look visible damage like a cracked solder joint.
BGA chipsets solder joints can't be examined because they are underneath of them.
Any impact great enough to damage the display or frame could damage the mobo.
Examine your work. Are ground pathways present especially if the phone is "open"?
Look for damaged ribbon cable and connector pins. Try disconnecting/reconnecting the battery (hard reboot).
blackhawk said:
All you can do is look visible damage like a cracked solder joint.
BGA chipsets solder joints can't be examined because they are underneath of them.
Any impact great enough to damage the display or frame could damage the mobo.
Examine your work. Are ground pathways present especially if the phone is "open"?
Look for damaged ribbon cable and connector pins. Try disconnecting/reconnecting the battery (hard reboot).
Click to expand...
Click to collapse
HI, thanks so much for the quick reply! Unfortunately, I didn't see anything. I might come back to it with a better lens tomorrow for the week end. Would it be necessary to post a picture or two here tomorrow, to have a more professional opinion?
Thanks!
Iliassine said:
HI, thanks so much for the quick reply! Unfortunately, I didn't see anything. I might come back to it with a better lens tomorrow for the week end. Would it be necessary to post a picture or two here tomorrow, to have a more professional opinion?
Thanks!
Click to expand...
Click to collapse
You're welcome.
I'm afraid though that I contributed little to your cause...
You can try gently flexing the pcb and pressing on components with a pencil, eraser end to try to localize the trouble. The mobo is likely toast though if that's the cause. Mobo diagnostics just aren't available except at the manufacturer's level. Even then most repairs require a hot air station and a high level skillset to execute successfully. A few 3rd party shops probably rework them if there's high enough demand.
Always use a good case to protect internal components as well as the display and frame.
blackhawk said:
You're welcome.
I'm afraid though that I contributed little to your cause...
You can try gently flexing the pcb and pressing on components with a pencil, eraser end to try to localize the trouble. The mobo is likely toast though if that's the cause. Mobo diagnostics just aren't available except at the manufacturer's level. Even then most repairs require a hot air station and a high level skillset to execute successfully. A few 3rd party shops probably rework them if there's high enough demand.
Always use a good case to protect internal components as well as the display and frame.
Click to expand...
Click to collapse
Oh no, you did great! You gave me probably more information than I found the last few months! I will try the eraser thing, maybe I'll have some luck. I didn't really touch the board unless the un clip removal of components bands. I will take it down and see if this is what is going on! Thank you. I will keep the thread up to see if someone else has ideas and keep you updated!
Examine the mobo under an excellent high lumen point light source and use optical aids. Stereoscopic ones are best for this. Examine at different angles to look for solder cracks. They tend to be difficult to spot.
Remember out of circuit assemblies like the mobo are sensitive to ESD damage. Use a bare wood surface if no ESD mat/wrist strap are available. Raise room humidity to at least 50%.
Wear cotton not wool or synthetics.
Discharging yourself directly to an earth ground immediately before handling it helps. Nearly every object can retain a static charge to one degree or another even paper. Humidity helps to dissipate it once present but almost any material movement/friction can generate it.