MI A2 can't boot. Stuck on black screen - Xiaomi Mi A2 / 6X Questions & Answers

Till yesterday my Mi A2 worked flawlessly. The phone went out of battery so I tried to charge it but it had stuck on battery charging screen (the one without the %, in b/w). When I tried to boot it up it arrived till android one logo and then it returned to the battery charging screen.
After that I tried to let it charge for a while, I tried to boot it up another time but now the phone seems dead. When I try to start it it doesn't anything except a double blink of the led (white).
I don't know what to do know, can't access to recovery, fastboot etc. It was running last september patch (full stock).
I've bought it trough amazon but I can't really stay without the phone for days, if there is a way to recover the phone I will save much time.
Thanks

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[Resolved]Bricked phone or battery problems?

Hello, I'll start with writing all the things i did:
I flashed JenaMIUI v1.29 succesfully then i waited about 30 minutes at the boot image, then I got the battery out, tried again another 10 minutes stuck at the boot image. After that I reflashed JenaMIUI v1.29 wiped data etc...same thing, stuck at boot image, I got the battery out and back in, one time just after turning on the phone ( before the boot image appear). Then I could'nt start the phone in recovery or normal or download mode. After some tries and leaving the phone for a few minutes i managed to start it normally( but still stuck at boot image) , so I wasn't able to get to recovery, one time I managed to power it up with the charger on, it showed a circle 1/4 full and then went to boot image. Now I'm not able to power up the phone at all, I tried getting the battery out and back in several times. When I connect the charger to the phone with no battery in it, it shows a black screen for a second then nothing. I am not able to start it in recovery or any other way. Is this a battery problem or sth like the mother board ? The bin counter is set to 0 (using triange away), can I take it to service ?
One more thing, when i managed to start it normally and was stuck at boot image i pressed all keys(vol up,down,home,power) and went into a black screen saying something with ARM ..idk.
Is this a battery problem or a brick ? What can I do ?
EDIT: I think the problem was caused by pulling out the battery right after powering on the phone, solution...disconnect battery from phone leave it for 10 minutes, hold power button for 30seconds then turn on the phone in download mode and flash stock...that worked for me
Are you stuck on Miui bootanimation?
Now i can't get it to turn on...i tried replacing the battery , but when i press power nothing happens
Edit: I'm pretty sure is battery problems because I pulled out and put in the battery very fast ...
no, never pull out battery while the device is on splash screen. Wait till boot animation at least. In that moment the kernel is being loaded. This is also causing the recovery bug. People get boot-loop and reset their phone by pulling out the battery. It's actually true, it's the same as if you turn off your PC by unplugging it from power cord.
So if the kernel has some problems because i pulled the battery out while it was loading...can I take it to service ? Can they see what ROM I have installed regardless of my 0 bin counter ? Will they give me a new phone or sth ? Will a lie like...I tried to change the grey case with the orange case and the battery fell out while I reseted the phone work ?
EDIT: I managed to "repair" my phone ! I used a method I found on the internet. I hold the power button for 30 seconds ( while the battery was disconnected) and then put the battery in and I managed to get it in download mode and flash stock rom, now everything works great)
Sorry for the inconvenience, i wrongly packed the rom
RageFoxtrot said:
Sorry for the inconvenience, i wrongly packed the rom
Click to expand...
Click to collapse
No problem...i knew the risks I was taking...and as long as everything turned out fine, It's all good.

0% battery after crashes

So I've had this phone for about a year now, the moment I got it I unlocked the bootloader, rooted it and flashed cyanfox (cm11 fork) onto it.
It's been serving me great ever since, no problems whatsoever with it.
But as of a few days back I found it with a black screen, unresponsive. I connected the charger and it light up the green led solid, tries to boot but can't get past the boot loader message
This continues in an almost endless loop until getting to a 'battery 1%' screen with it showing the battery. After that I'm able to boot it up without problem
I first thought that was the end of it.. I finally got it too boot all seemed fine, battery showed 3% at start up bit voltage was suggesting it was 100%. It flashed to 100% later.
Good, no problem until then. But when leaving it over night to charge and disconnecting it from the charger this morning it turned off again. And now it's back in the bootloop when on charger :crying:
also important to mention is that when it crashes and gets into the bootloop on charger(0% battery and all) it was at 50-100% before the crash.
If anyone has any ideas what might be the cause I'd be very thankful
Main problem(s):
-random crashes instantly rendering battery % as 0 while there is still charge
-getting atrix hd to turn on at <1% battery
Some maybe useful information:
-it does say 'battery OK' in fastboot while connected to the wallcharger
-after I get it to boot it will run just fine on battery and charge as normal, but will crash/brick again after some time
-I can get into boot selection screen and fastboot, but only on wallcharger
-I cannot get to fastboot when connected to use, pc doesn't see the phone
-It won't boot past the bootloader('Motorola logo' for you on not unlocked bootloaders) no matter the boot selection(recovery, bp tools etc)
-This is a second hand model already in use by me (the second owner) for over a year now
-no custom kernel, only rom, cyanfox 4.4.2 (cm11 based)
-the few times it got past the bootloop and I was able to boot was on my aftermarket charger (stock charger will make the green led light up but no proof of being able to get past bootloop over time on it)
I've had dead batteries before.. and since It looked good last time I got it on (it won't go on at all now) I was skeptic about the battery being dead. But a quick test of the multimeter gives me <1v :crying:
I know batteries can be drained pretty bad.. but this just seems a bit extreme.. I'll try to get it to boot for a while.
Thanks in advance for any helpful solutions or ideas on the matter
EDIT: Got it on again last night, turned off this morning when pulling out the charger, was at 100%. Checked battery and again read around 1V.
blaming the battery, ordered a new one just in case, should be here in a month or so. Still open for suggestions on the matter
Catblaster said:
I've had dead batteries before.. and since It looked good last time I got it on (it won't go on at all now) I was skeptic about the battery being dead. But a quick test of the multimeter gives me <1v :crying:
I know batteries can be drained pretty bad.. but this just seems a bit extreme.. I'll try to get it to boot for a while.
Thanks in advance for any helpful solutions or ideas on the matter
EDIT: Got it on again last night, turned off this morning when pulling out the charger, was at 100%. Checked battery and again read around 1V.
blaming the battery, ordered a new one just in case, should be here in a month or so. Still open for suggestions on the matter
Click to expand...
Click to collapse
Did you fix it somehow in the end?
My Atrix HD freezes after several minutes(sometimes even on wall charger). Bought new battery, tried to reset everything: usb storage, cash, system, factory reset. Went back to ROM I was using before(stable) but didn't help.
?
michael8s said:
Did you fix it somehow in the end?
My Atrix HD freezes after several minutes(sometimes even on wall charger). Bought new battery, tried to reset everything: usb storage, cash, system, factory reset. Went back to ROM I was using before(stable) but didn't help.
?
Click to expand...
Click to collapse
It ended up being the battery, all problems were gone after I changed the battery.
Which in the end wasn't so bad because I'd been wanting to upgrade my eb20 to an eb40
No Idea to what it could be in your case.
Everything working appart from that? no battery hickups or things not working properly?
Catblaster said:
It ended up being the battery, all problems were gone after I changed the battery.
Which in the end wasn't so bad because I'd been wanting to upgrade my eb20 to an eb40
No Idea to what it could be in your case.
Everything working appart from that? no battery hickups or things not working properly?
Click to expand...
Click to collapse
"0% battery after crashes" that is what was happening in the begging, so I thought it is the battery. I changed it to UB40
but everything's got worse. With the new battery I have crashes even when the battery is almost full.(but not always, for example I can play movie from youtube normally, but when I try to send sms or something else it crashes ).
Hard to believe that there is something with the new battery(I have it just one week+It took a month to ship from ebay).
I tried to flash another ROM, but still have freezes.
Last thing sometimes battery charges normally but then suddenly jumps to ~100%. Now I try to flash Stock ROM, but eventually soft bricked the phone. (+had "battery low" in fastboot, while charging animation was saying 100%)
Where did you buy EB40?
____________________________________
It turned out that EB40 battery was bad, after replacing it with another one everything work

my moto x cm13 wont charge after dying

So last night I was really tired from work and I went straight to sleep but didn't charge my phone. This morning when trying to charge it I notice loops from the battery icon screen to bootloader screen back to black and won't charge at all. I tried to go into fastboot but it didn't really help either.
It charging in fastboot now hopefully that works
edit: nevermine I just returned it back to stock

Phone constantly turning off

Hi.
I have a major problem with my HTC One M7. I had been using Tesla OS for quite some time, and decided to upgrade it. All of it seemed to work fine. However, just as I declined a coming call, the screen turned black. I was able to enter hboot/fastboot screen, but when I have tried to turn it on, the OS image just flashes and it turns off again. Same is with the TWRP, a loading screen is visible for a split second, and it just goes black. Everything seems to work fine when I completely discharge it to 0% and charge it back on again. I have done a factory reset and flashed a stock ROM, but the problem persists, after some time the screen just goes black and it is the same all over again (the image of OS/TWRP comes on for a sec and then the screen goes black). The only solution so far is to charge it out (by leaving it on the white hboot screen) and then charge it again, but it is impossible to use the phone like that. Maybe someone has already overcome this problem or has any ideas on how to do it? Any help will be appreciated!
Replace battery
Hello.
I had same problem about 2 monts ago. Phone were charged about 40% and after taking photo or any other activity it's turning off and after connecting to charger it was show 0%. So I highly recomend to replace battery. I bought on ebay[dot]com from seller - eforcity about 5$.

Phone won't go past MIUI logo after battery replacement

I ordered a replacement battery online which came with an inverted socket (the + position is in minus, and the - position is in plus) So I attached it in reverse and the phone boots up and goes to miui logo and then turns itself off. Is the battery bad or is there any other issue? Connecting to the charger is charging the battery, but it won't boot.
Moreover, now when I am trying to start my phone with the old battery, it boots up for a second and then goes off. Phone does not even vibrate (It is vibrating with the new battery but not going past miui logo) The MI Logo comes and it goes off. the old original battery is not charging also now.
I am on the latest version of MIUI 12.0.3 Any help on this would be truly appreciated as this is my primary device and finding another new battery is very difficult at present with so many trade restrictions in place in India. Thanks in advance.
PS: I do not want to lose my data and the phone was working fine before. Just the battery backup was bad.

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