When connected to charger:
-The red LED flashes, and it does not react to the power button, I tried every combination, no use
When not connected to charger:
-Nothing works, it does not show even slight signs of life
The problem happened when I was replacing the front camera because the camera stopped working. The next thing was it won't turn on. It may be a faulty camera that caused a short circuit. I was not sure, so I opened it, tested the battery with multimer, it did not provide any output. Then I checked the pins on the motherboard, and it showed 1.12V exactly.
I know from other phones that the voltage that motherboard gives is usually higher, around 4V so I'm not sure if the issue is on the motherboard or in the battery itself. The weird thing is that the battery was charged, around 50% and now it does not even react.
Any help will be appreciated.
EDIT: I found the problem on my battery flex cable. The service that worked on my phone before must have damaged the flex and it was making direct contact on the motherboard. Luckily it caused the battery circuit to fail and not to damage the motherboard.
Related
Hello my Xperia Sp just run out of battery and shut down.I pluged it in saw the sony logo and when i tried to turn it on it would not respond.
The only thing it did was kept the red light on (indicating charging).I tried pressing the off button for over 30 seconds with no results. Not it is stuck and i cant do anything about that.
Help please.
Nevermind the problem got fixed by itself.
The battery (about 2 % run out and the phone kinda reseted itself.It opened just fine.
So if anyone else gets this problem just let your battery drain itself.
jackaros said:
Hello my Xperia Sp just run out of battery and shut down.I pluged it in saw the sony logo and when i tried to turn it on it would not respond.
The only thing it did was kept the red light on (indicating charging).I tried pressing the off button for over 30 seconds with no results. Not it is stuck and i cant do anything about that.
Help please.
Click to expand...
Click to collapse
Just to confirm you plugged it into a mains supply? USB from your computer to phone charging is not enough to kick start a totally dead battery.
If you have plugged it in to a wall socket and it still doesn't work, give it some time.
I think the battery and the phone's software combine to stop the phone operating at unsafe voltages, the safe operating range for a standard lithium ion batteries is 3.2-4.2 volts (though android may be different). They spend most of their time at 3.7 volts though and this is why they are described as such when you buy them separately.
If, for some reason your phone's software thinks your battery is at 3.1 volts, it won't do anything until it thinks it's at 3.2. Similarly if a protected battery is taken below 3.2 volts it won't provide any power until it hits its minimum voltage. In theory your phone should have cut out before the protection cut in, but bad stuff happens to good people.
Sometimes a protected battery gets drained so much that the tiny flow of electricty required to power the protection circuit stops and as the ultimate failsafe, protected batteries stop working when this circuit is not functioning.
(I'm talking about standard batteries here, not necessarily phone ones)
Sometimes cheap basic chargers won't be able to get such batteries working, but better chargers are able to send tiny trickles to a battery to start the protection circuit and make such batteries charge again. I'd be very surprised if android didn't take this into account and have some way of ensuring over-discharged batteries with a tripped protection circuit can be charged. That said I'm not sure whether the protection is all software on mobile phones?
Like I say give it some time - getting that first .1 of a volt can take a while when the battery is totally flat. If it hasn't changed after at least 2 hours then I'd worry.
Parkside said:
Just to confirm you plugged it into a mains supply? USB from your computer to phone charging is not enough to kick start a totally dead battery.
If you have plugged it in to a wall socket and it still doesn't work, give it some time.
I think the battery and the phone's software combine to stop the phone operating at unsafe voltages, the safe operating range for a standard lithium ion batteries is 3.2-4.2 volts (though android may be different). They spend most of their time at 3.7 volts though and this is why they are described as such when you buy them separately.
If, for some reason your phone's software thinks your battery is at 3.1 volts, it won't do anything until it thinks it's at 3.2. Similarly if a protected battery is taken below 3.2 volts it won't provide any power until it hits its minimum voltage. In theory your phone should have cut out before the protection cut in, but bad stuff happens to good people.
Sometimes a protected battery gets drained so much that the tiny flow of electricty required to power the protection circuit stops and as the ultimate failsafe, protected batteries stop working when this circuit is not functioning.
(I'm talking about standard batteries here, not necessarily phone ones)
Sometimes cheap basic chargers won't be able to get such batteries working, but better chargers are able to send tiny trickles to a battery to start the protection circuit and make such batteries charge again. I'd be very surprised if android didn't take this into account and have some way of ensuring over-discharged batteries with a tripped protection circuit can be charged. That said I'm not sure whether the protection is all software on mobile phones?
Like I say give it some time - getting that first .1 of a volt can take a while when the battery is totally flat. If it hasn't changed after at least 2 hours then I'd worry.
Click to expand...
Click to collapse
The phone was pluged in the wall socket.After this i tried to turn it on (while pluged) nothing happened so i unpluged it to press the off button (i upluged it because i could not reach the button because i had the case on) but the red light ( at the bottom of the device indicating charging) did not turn of.So i tried to reset the device by pressing the off button but i waited for almost 30 seconds (while pressing it) and nothing ... not even a vibration.So i left the phone away with the light stick on till the 1 % left was drained and the phone shut down due to lack of power.
So then i pluged it back in to the wall socket and it started charging again and so i turned the device on.This time it responed and opened up .Now nothing is wrong
It happened again.... i dont know the problem but the solution was the same...
jackaros said:
The phone was pluged in the wall socket.After this i tried to turn it on (while pluged) nothing happened so i unpluged it to press the off button (i upluged it because i could not reach the button because i had the case on) but the red light ( at the bottom of the device indicating charging) did not turn of.So i tried to reset the device by pressing the off button but i waited for almost 30 seconds (while pressing it) and nothing ... not even a vibration.So i left the phone away with the light stick on till the 1 % left was drained and the phone shut down due to lack of power.
So then i pluged it back in to the wall socket and it started charging again and so i turned the device on.This time it responed and opened up .Now nothing is wrong
Click to expand...
Click to collapse
You left the phone in the charger to drain or not? If i put the charger off then red light isn't opened..
Also, how many hours did you wait?
billaras481 said:
You left the phone in the charger to drain or not? If i put the charger off then red light isn't opened..
Also, how many hours did you wait?
Click to expand...
Click to collapse
It took about half an hour because of the battery level being low.
Guys im having the same problem.. anyone who can help will be appreciated.
Can someone tell me what this flex cable is connecting?
My phone would sometimes spontanously freeze and switch off, showing the 3 red leds and just stops responding. It won't even take a charge. Usually the battery is at 60% when the phone dies, and sometimes it shows a constant RED led.
The back cover is loose (but has enough adhesive to actually stick reasonably, takes little force to open it up), so I pressed that connector with medium force. The next thing that happened, is that the phone responded to the charger, booted to the "charging state", where it shows the battery state and so on (which it shows it's approx on 60%.
Or could it be that I press something else, which causes my phone to work properly again?
emiglet said:
Can someone tell me what this flex cable is connecting?
My phone would sometimes spontanously freeze and switch off, showing the 3 red leds and just stops responding. It won't even take a charge. Usually the battery is at 60% when the phone dies, and sometimes it shows a constant RED led.
The back cover is loose (but has enough adhesive to actually stick reasonably, takes little force to open it up), so I pressed that connector with medium force. The next thing that happened, is that the phone responded to the charger, booted to the "charging state", where it shows the battery state and so on (which it shows it's approx on 60%.
Or could it be that I press something else, which causes my phone to work properly again?
Click to expand...
Click to collapse
Cable with connector in green box is for side keys, gyro and microphone. :good:
neoxx3m said:
Cable with connector in green box is for side keys, gyro and microphone. :good:
Click to expand...
Click to collapse
Thanks/Hvala!
But do you know what could be faulty on this specific point, which causes my phone to not charge? Can I find somewhere a complete guide to the disassembly and identification of all parts? It would make it alot easier for me . My phone is running again, going strong at 65% and still discharging for the last 3 hours. I'm logging the microVolts, temperature and other stats from the battery to see if it's the battery causing the malfunction, which I doubt.
Anyway, there should be something. By the way, prior to the issues, my phone dropped flat on the screen on tiles, about 1 meter high. So most likely, there is something loose/messed up. But I don't know what causes the entire system to flash the LED 3 times, saying that the battery is drained, yet after pressing on this point, immediately start up while on the charger.
emiglet said:
Thanks/Hvala!
But do you know what could be faulty on this specific point, which causes my phone to not charge? Can I find somewhere a complete guide to the disassembly and identification of all parts? It would make it alot easier for me . My phone is running again, going strong at 65% and still discharging for the last 3 hours. I'm logging the microVolts, temperature and other stats from the battery to see if it's the battery causing the malfunction, which I doubt.
Anyway, there should be something. By the way, prior to the issues, my phone dropped flat on the screen on tiles, about 1 meter high. So most likely, there is something loose/messed up. But I don't know what causes the entire system to flash the LED 3 times, saying that the battery is drained, yet after pressing on this point, immediately start up while on the charger.
Click to expand...
Click to collapse
Please PM me. (you speak croatian?)
Hi all, my z3 compact has been damaged by water.
I opened it and let it dry.
But now it seems dead.
I am not able to turn it on at all: no boot, no screen on, no vibration and no led with power button ( also tried the power button + vol +/-)
When connected to the charger: only the red led stays on but no boot, no screen on and no vibration with power button.
Any advice to repair my phone?
Maybe have to replace the battery? Or disconnect and reconnect the battery?
Thank you for advices
Unfortunately non of those will fix Your problem. First You should disassemble Your phone, take out motherboard, take off alu shields from motherboard and clean whole motherboard with isopropyl alcohol. After that you can try to charge battery but if there is some short circuit on motherboard made by water damage charging Your phone without cleaning motherboard can damage it completely.
Ok, thank you for your advice
Is it possible to check my battery with an ohmmeter or ampermeter? If yes, what are the results for a healthy battery?
Sorry to hear that, i also experienced the same water issue. It was my first xperia, Z. I did the same thing, disassembled completely every detachable components, let them dry and clean but still dead. You will have to find a spare working motherboard, maybe you can still use some components -if working- like batter, speaker, buttons.... i found an old one (screen, hardcase and buttons broken but battery and motherboard still working), replaced the inside components and made it work.
tebra said:
Is it possible to check my battery with an ohmmeter or ampermeter? If yes, what are the results for a healthy battery?
Click to expand...
Click to collapse
If there was short circuit on motherboard battery can be fully discharged but to charge it again You need to remove short circuit first. After that if nothing is burned by electrical circuit You can charge battery regular way.
Hi everyone,
I'm really hoping someone can help me.
I have a Samsung galaxy tab s2 8inch. It is the SM-T710.
It was working fine playing music on a Bluetooth speaker system then the battery died.
Tried to charge it and it was acting funny, said it was charging then got to one or two percent and i attempted to power on while the device is on charge and it powered on then turned off within a few seconds.
Let the tablet charge for a while now and its not really going up and the screen has gone off and its not turning on and i now notice its getting really hot at the bottom part of the screen slightly above the home button.
Removed the charger and left it for one hour, then came back and tried with a different new genuine Samsung charger and cable, and still getting extremely hot within a few 5 - 10 seconds just above the home button.
Unplugged it and left it till the next day and attempted to charge it again same thing.
I though it could be either: A faulty battery or A faulty Micro USB charging port flex (possibly short circuiting).
Now Ive opened up the whole device and taken apart every item on the mother board following a tear down video on YouTube.
I then connected a brand new genuine battery to the board and removed the old one, and the device was still overheating however this time i could pin point the exact source of heat on the motherboard which i will circle on an image but cant attach to this post as i need ten posts.
The images are on my public google drive but i cannot share the links here any ideas?
I then thought the micro USB charging port flex is causing a short circuit and so i completely disconnected that and the overheating problem still occurred.
Then i disconnected each and every component one by one and still the same thing on the motherboard keeps overheating excessively within seconds of connecting the battery to the motherboard.
Now Ive completely removed the motherboard from the frame and Ive connected the battery to it and same overheating issue.
Now Ive reconnected just the micro USB charging port back to the motherboard and attempted to plug a charging cable into the port and exactly the same thing still overheating excessively.
I really do not want to replace my motherboard simply because of the data on the device etc.
Can someone please tell me what the red circled item is in my image so i know what is overheating!
Could it be the CPU?
Is there ANY other way to replace JUST that part, even in china? Can anyone advise or help me?
Many thanks to the people who patiently read this and helped.
Kaiser
London, UK
+1
I guess the motherboard got corrupted
First off, do not boot up an almost empty device. Second, it is entirely normal that the bottom area (charging port, home button etc) gets hot while charging. It will fade after the battery got some essential energy. Third, do not deplete the battery completely, if possible. In the long run it may damage the longevity of the battery.
Was there ever a solution to this issue? I'm having the same problem.
Hi guys,
I had to change both display incl. frame and battery because a barbell fell on my Mi9. This bent the phone at the place of the battery and completely destroyed the display.
I was able to repair the phone quickly, but unfortunatly I did not glue the new battery. Now I was mountain biking and due to the vibrations the battery was torn from the mainboard and parts of the battery cable got stuck in the connector. I had these parts removed carefully by a watchmaker and he assured me that the connerctor looks undamaged.
But now I have the problem that the phone won't start when I insert the old (minimally) bent battery. It does not respond to any input. Only when I charge it, the LED is blinking slowly and the MI Start logo appears for 1/4 second. This process is repeated continuously. The battery also warms up slightly, showing me that it is being charged and that the connection is basically established.
Can you detect a defect on the board by this error description or is this a "typical" battery problem? Or does this error description look familiar to you otherwise?
Thanks for all suggestions,
Mike
Well I'd say that will be a hard problem to diagnose without knowing what to look for, and I definitely don't know but what I'd suggest so you can rule out the battery problem is to try a different battery in the phone and see if you get the same response. If it works happy days problem solved. If not it is more than likely a main board problem or charging connector.