My A1 "died" and i dont know why

[KaioSilvaA1]

Hello folks.

So I left my A1 charging at night, the alarm woke me up as usual in the morning. Just before leaving home I took it to check the time and then it was already "dead".
PS: The phone was never been knocked over, wet etc...

Symptoms:
- Black screen, as if was turned off / without battery;
- Buttons do not work;
- Doesn't react to any connections.
- Doesn't enters fastboot mod;
- It's not recognized by the computer;
- Also not charging.

Any help is welcome, best regards.

 

[SALVO9]

happened to me the other day on AEX, after flashing a kernel, turns out it does switch on but I had to press the power button for quite some time and then it switched off again upon minutes from switching on. I entered the recovery with the same method and installed another kernel, it works fine now

 

[KaioSilvaA1]

happened to me the other day on AEX, after flashing a kernel, turns out it does switch on but I had to press the power button for quite some time and then it switched off again upon minutes from switching on. I entered the recovery with the same method and installed another kernel, it works fine now

So, let me get this right, in ur case the phone was still working, u just had tu push the butoms for a little more time?

I tryed it here, power/Power + Vol Down/ Power + Vol Up/ Power + both vol down and up, all of them for more than a minute, nothing happened, not even a single vibration, sound or light. =[

 

[Dead-neM]

So, let me get this right, in ur case the phone was still working, u just had tu push the butoms for a little more time?

I tryed it here, power/Power + Vol Down/ Power + Vol Up/ Power + both vol down and up, all of them for more than a minute, nothing happened, not even a single vibration, sound or light. =[

Hapenned to me on a moto g 4g
Phone's nand or motherboard was dead...

Use your warranty you look like to have a faulty device especially if you were on stock

 

[KaioSilvaA1]

Hapenned to me on a moto g 4g
Phone's nand or motherboard was dead...

Use your warranty you look like to have a faulty device especially if you were on stock

Damn =[
It's a possibility, but it's strange the phone has like 4 months of use, never had any problem.
I'm willing to try some stuff first, even open the phone to unplug and replug the battery on the mb.
Otherwise at my country (Brazil) Xiaomi has no warranty

 

[JakobSWE]

I had this problem and it was just due to an loose flex cable. Try opening and reattaching them :good:

 

[KaioSilvaA1]

I had this problem and it was just due to an loose flex cable. Try opening and reattaching them :good:

Oh boy, i hope it's "just" something like that, i'm going after the tools to open it, thk!

 

[JakobSWE]

Oh boy, i hope it's "just" something like that, i'm going after the tools to open it, thk!

No problem, just two screws att the bortom and use the nails around the edge. Be careful not to break the plastic frame around the screen, it can be quite weak.

 

[KaioSilvaA1]

No problem, just two screws att the bortom and use the nails around the edge. Be careful not to break the plastic frame around the screen, it can be quite weak.

So yesterday a oppened the phone, disatached the flats and atatched then again, unfortunatelly didn't help =[.
We also made some tests and seems like it could be an issue with the battery seems like it's not charging nor receiving any charge.
Seems like the "regulator" of the battery or something like that is not working as it should.

I'm gonna try to test this a in a more acurate way, at least to be sure that it's the battery.

 

[luxerinolt]

Probably on EDL mode. Try reflashing stock with MiFlash. Helped me once.

 

[KaioSilvaA1]

Probably on EDL mode. Try reflashing stock with MiFlash. Helped me once.

I'm making some research about this "EDL Mode". Hope it works, gonna try this later, thk!

 

[GVN.Gallus]

I'm making some research about this "EDL Mode". Hope it works, gonna try this later, thk!

You can try make edl usb cable first, if not work then search mi a1 test point, you'll need to jump 2 point on motherboard with wire/pin.

 

[CosmicDan]

So yesterday a oppened the phone, disatached the flats and atatched then again, unfortunatelly didn't help =[.
We also made some tests and seems like it could be an issue with the battery seems like it's not charging nor receiving any charge.
Seems like the "regulator" of the battery or something like that is not working as it should.

I'm gonna try to test this a in a more acurate way, at least to be sure that it's the battery.

The phone will power on without any battery attached at all, so remove it and see if you get life. If not, then it's not the battery.

 

[bomil]

http://en.miui.com/thread-1680467-1-1.html

 

[KaioSilvaA1]

You can try make edl usb cable first, if not work then search mi a1 test point, you'll need to jump 2 point on motherboard with wire/pin.

So yesterday i tryed to make the phone enter at the EDL mode, by jumping the 2 points on the motherboard. Unfortunately the computer didn't recognized the phone at all, i'v tryed several times.
I'm starting to think that something related to the the motherboard just died.

I'll lend it to a tecnical that can fix it or at least confirm the death of the phone to me.

 

[KaioSilvaA1]

The phone will power on without any battery attached at all, so remove it and see if you get life. If not, then it's not the battery.

Just tested it yesterday, without success.
Even with the battery disconnected and ubs at computer or charger, the phone still not giving any signal of life.

Does it mean that it must be a serious problem?

 

[KnieveI]

Just tested it yesterday, without success.
Even with the battery disconnected and ubs at computer or charger, the phone still not giving any signal of life.

Does it mean that it must be a serious problem?

Hi.
I have got the same issue with my A1 as you. Totally dead after charging. Doesent seem to respond in any way.
Have tried out everything found sugested online so far.
Please give an update if you get it back to life somehow.
Thanks
Knievel

 

[KaioSilvaA1]

Hi.
I have got the same issue with my A1 as you. Totally dead after charging. Doesent seem to respond in any way.
Have tried out everything found sugested online so far.
Please give an update if you get it back to life somehow.
Thanks
Knievel

Hello mate.
I'm sry for you phone, at my case i'm starting to believe that the mb/cpu died.
I was thinking that it could be the board at the bottom (ubs, mic jac) but i have been told that it's really rare this to happen.
Yesterday i tested the battery and it's fully charged, (so the battery isn't the problem)
I'm weeling to take it at the end of the week into a tec who can test all the hardware stuff in order to know what actually have failed.

Have u also tryed to engage ur phone at EDL Mode?

 

[KnieveI]

Hello mate.
I'm sry for you phone, at my case i'm starting to believe that the mb/cpu died.
I was thinking that it could be the board at the bottom (ubs, mic jac) but i have been told that it's really rare this to happen.
Yesterday i tested the battery and it's fully charged, (so the battery isn't the problem)
I'm weeling to take it at the end of the week into a tec who can test all the hardware stuff in order to know what actually have failed.

Have u also tryed to engage ur phone at EDL Mode?

Hi.
Yep also tried shorting the test points, it does not respond to anything. Just totally dead.
Its sad cause i really loved that phone. I might buy a used cheap one with a broken screen and use its main board or other parts.
Thanks Knievel