Hi, im trying to use phone - (huawei mate 10 lite) as a head unit for my car. I have 2 questions:
1. Is it possible to run phone without battery (because of the temperatures in car) if it will be connected to the charger (something like that
) and is it possible to run it automatically when connected to the charger without having to press the button?
2. What's the best way, to boot phone as fast as possible?
Its important to me to do this on this phone, because size of it suits the most to the original frame im my car.
Phones are not designed to work without a battery that provides power dynamically. Even if this is possible for a few smartphones, it requires the use of special power supplies.
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Guys,
I can't get my phone to charge.
The power from the USB alone is good enough to display the battery icon, so the display works, the processor, the RAM, etc... (see attached animated gif).
So I believe it is not a USB connector issue.
But I never get the level up and the phone won't boot.
I checked the battery level with a voltmeter and get 3.4V which is not full charge but should be enough to boot (I guess ?).
The power from the battery somehow does not seem to get routed to the "appropriate place".
I believe this could be related to a battery connector issue, or a motherboard issue (connection to the power management chip), or the power management IC itself. What you guys think ?
Edit 1: After some time I unplugged the phone from the charger and tried to boot again. This time I got a boot loop on the "Samsung Galaxy S3" name (white letters on dark background - see animated gif) : another sign of life ! I then tried to enter download mode in the hope I could flash the phone with Odin... But I can only get to the warning message telling me to press vol Up to confirm Download mode. Unfortunately pressing VolUp reboots the phone (see animated gif)
Edit 2: After some time I checked the battery level again and it increased to 3.6V ! So the charge seems to work... So does the battery connector.
I am now thinking this could be as simple as a weak battery : the voltage is not all (I measure it with a multimeter : no charge, no current drawn), the battery needs to be able to provide the current the phone needs for booting. This would exlplain the boot loop. Even I guess the fact that the battery level drawing does not get its animation : this requires - some - CPU power/current.
Edit 3: Ii also tried a jig USB dongle to boot into download mode. I succeed entering download mode, but phone turns off again after 2 seconds. I don't have another S3 battery for now. Does anyone know what the 4 battery pins are made for ? Two pins are obvious as they are marked + and -. What about the 2 others ? Am I supposed to be able to boot the phone with a voltage generator connected to + and - pins of the phone, leaving the 2 other pins floating ?
Edit 4: bad news... I could connect my S4 battery to it. I know this battery is good as it powers my S4 with no problem : it surely has enough current capability for an S3... Unfortunately the S3 keeps looping ;-(
Edit 5: I found that this is related to the power button : even though it does not mechanically stay on (pushed), it stays electrically as if I was keeping it pressed. This explains the boot loop perfectly. I took the motherboard off and tried to "clean" the push button component (see attached image), reconnected everything, put all back in and ... bingo ! it works... BUT it is weak : it did restart its boot loop after a few calls for the new year... However I could restart it again quite easily this time. I plan to use the phone for some time and I'll decide wether I need to replace the push button on the motherboard.
Hi,
I hope I'm posting this question in the right place.
Any way, I have a Galaxy Note 5 Clone (Chinese).
I really like this phone. For my purposes, I am happy with its performance.
There is one thing that I noticed that is really puzzling.
I'm going to list the process in steps:
1- I power off the phone.
2- Connect the charging cable either directly to my computer (USB port) or connect to a wall outlet through the charger.
3- The phone starts to charge and I get the animated picture of it charging.
4- After a few seconds, the phone powers up on its own.
This is the part I don't get.
Is this normal behavior for this clone or is there a setting somewhere that needs to be turned ON or OFF.
By the way, it is running Android 5.1.1
Appreciate any help in this matter.
Before anyone says "this has been answered a million times" and posts a link, I want to assure you that I have read every single thing I can here on xda before posting.
The current status of my DNA is unknown to me. The device is rooted and has been for quite a while. It is S-OFF and has been for 3 years. The bootloader is UNLOCKED and has been for 3 years. The recovery is TWRP (most recent version for the DNA). The ROM it was running was santod040's GPE ROM for the DNA. It was running that rom for 6 months.
The device had no Sim card in it. It was used primarily as a backup device if I needed it and to play a few gaming apps that I have multiple accounts with (clash of clans). The device was used only on wifi for gaming. No apps were downloaded to the device prior to the device failure. No websites were visited prior to failure. 360 security was on the device as the primary antiviral app.
Symptoms that created current affliction:
None that I know of
Current affliction(s):
Will not power on
PC USB will not recognize (running Windows 10 - HTC Sync is NOT installed on my computer)
Will not hard reset
Will not boot to bootloader
Will not charge on AC power with original HTC charger (led flashes but never goes solid)
Will not charge on AC power with alternative triple shielded cables (led flashes but never goes solid)
Will not charge with any cable via PC USB (led flashes but never goes solid)
Possible remedies to affliction that have been attempted:
Volume down and power button simultaneously - FAILURE
Volume up and power button simultaneously - FAILURE
Both volume up and down with the power button simultaneously - FAILURE
Holding power button to reset manually - FAILURE
ADB - FAILURE
Boot to bootloader - Not possible for the moment
Boot to recovery - Not possible for the moment
Power up - FAILURE
The only thing it does is flash the amber led light when attached to AC or the PC via the charge cables (I have tried many)
Any and all help or solutions to at least get it back to recovery or the bootloader would be appreciated. I have the RUU 1.15 and a stock original backup saved to the PC. If I can get to at least recovery I should be able to sideload or oem lock the device and run the RUU. But for now I can't even get a screen.
Please help in any way you can and I thank you all in advance for any assistance rendered.
I don't know,but i can only assume that the battery is dead. You can buy new battery and try to replace it yourself. I bough battery replacement for my Droid DNA in case something happens from aliexpress : http://www.aliexpress.com/item/orig...rfly-droid-dna-htl21-bl83100/32260653385.html
HTC Droid DNA Battery Replacement Guide: https://www.youtube.com/watch?v=aFCvGcG0dVs
I give just a guess.
it seems, like cirios83 said, battery is "dead", i.e. battery is alive, but it self-locked by controller on very low voltage level.
why?
something makes battery drain. in my case it was unexpectedly died sound chip tf9887. time of replacing take over 1-2 hour in service (if they have an donor).
beffore going to service you can take off a back lid, disconnect the battery and measure resistance of supply chain. it must be close to infinity.
if it is not. you will know at least, that mainboard is in trouble.
this is example of one of many reasons why phone is "dead"
cirios83 said:
I don't know,but i can only assume that the battery is dead. You can buy new battery and try to replace it yourself. I bough battery replacement for my Droid DNA in case something happens from aliexpress : http://www.aliexpress.com/item/orig...rfly-droid-dna-htl21-bl83100/32260653385.html
HTC Droid DNA Battery Replacement Guide: https://www.youtube.com/watch?v=aFCvGcG0dVs
I give just a guess.
Click to expand...
Click to collapse
Since the phone is a uni body design, I have never looked into actually taking it apart. We do have a few places where I live that specialize in repairs and such, but I am not completely sure that the battery is the issue, it had one other problem that developed about a year and a half ago. That problem was the loudspeaker on the back no longer produced sound.
Perhaps there is a loose connection in the hardware itself causing it to no longer function. It's not a pressing matter as I do have another backup device or two. I'm just a little disheartened that it's no longer functioning.
Hello!
I have a Android phone (SG S4mini) that i put on my car to work with TorqueOBD2 and GMaps apps.
I'm from Salvador, Bahia, Brasil and here is super very hot place. And so, to avoid start a fire on my veichle I remove the phone baterry, put a Buck Converter (12v for 3.7v) and connect on post ignition key, direct on baterry terminals (soldering)
All works perfect for a long time till now. But my only problem is: i need manually turn on the phone every time I turn on the car.
So, I need a way to automatic turn on my phone on when voltage (or current) is detect on baterry.
Just to be clear, is not boot when charging, because I do not use the charge port. Is BOOT WHEN VOLTAGE/CURRENT IS DETECTED ON BATERRY TERMINALS.
Plz I really need help!
Hello!
So I bought a nexus 7 II tablet recently and I plan to plug it into my car.
I picked nexus because I think It's quite popular with devs. (And it had it's screen broken so I paid a little less )
The problem is, it Is an old vehicle and the only way I see it working without draining my car's battery when I'm not in the car is:
1. When there is no power supplied on the charger the tablet is off.
2. When I turn the ignition on, the charger starts working automatically, so the tablet turns on.
3. I'm using the tablet
4. When I turn the engine off, and the power is cut off, the tablet still stays on for 10/15 minutes (the exact ammount of time doesn't really matter - but sometimes you just turn
off the engine/power in a traffic jam etc. - I don't want the tablet to die instantly), and then turns off.
I think this wouldn't be bad at all but I need an Android version that:
1. starts up quickly (so I don't have to wait like 2 minutes after starting the car to use the tablet)
2. Has the option to shutdown if no power is supplied.
Are you aware of any android version that would suit those needs?
Or can I modify android myself in such a way that it does work the way I want?
thanks for help and advice
@edit
It would also be nice if the tablet has stayed awake all the time.
Is it possible?
@bump
Bump