Infinite samsung logo after the battery drains all - Samsung Galaxy A7 (2018) Questions & Answers

English is not my first language and i'am writing this using google translate so sorry for my english.
Yesterday, my battery went dead, so i put it to charge and its show a circle with a lightning logo inside the circle. It stayed like this for a few hours so i searched in the internet i found a solution which is hold volume down, i did the solutution and when i put the usb cable in the smartphone, it's turn on, show the samsung logo (secured by Knox) and its turn off after some seconds.
I've tried everything to fix this.
I tried odin with a flash stock and doesnt work.
Thanks and sorry for my english.
I can't open android recovery at all either.

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Phone will not boot into recovery

My phone is rooted with stock rom. The only changes are listed below
Froze bloat that was safe
changed bootanimation to stock samsung
replaced some apps with inverted versions of themselves (ex. google +, stock messaging)
Here goes:
I was using navigation and I noticed that my phone was off after I had finished. Nothing worked at all, I could not boot into recovery or download. I connected the phone to a charger and red led flashes and an empty battery appears. The battery was full. I could reboot the phone while on the charger, but it would shut off as soon as it got to the homescreen. While off, If I pressed the home button, the green battery would appear as if it were charging. From here I could boot into recovery and download mode. The phone will only boot into these modes while connected to the charger. Here is where it went bad. I attempted to restore a backup while the phone was on the car charger and my car charger got pulled out in the middle of a restore. No charger meant that the phone shut off mid restore. Now, when I plug in the phone, the red led appears and the empty battery with a circle inside appears and then goes away. This repeats itself over and over and the phone buzzes when the empty battery reappears. I can still boot into download mode but not recovery. If I try to flash the stock samsung rom via odin, it says that it passes, however upon automatic reboot the samsung appears and nothing else. After the samsung appears the phone just continues to buzz every 5 seconds or so as if it is trying to do something. Could it be a bootloop? I have done a ton of searching here and now I am resorting to help! Your time is appreciated and beers on me if you can help me get my phone back to normal.
What Rom/kernel were you using before this happened? If custom, which one?
I have another thread a few posts down with the same topic. I am going to delete this one. I was stock rom and kernel. For some reason the phone will not recognize the battery. I tried a new one at verizon and the same thing. I can now boot into both recovery and download mode when connected to the charger , but the phone shuts off as soon as it boots and shows an empty battery with a circle in the middle. Sometimes it does not make it through the verizon boot animation and sometimes it makes it all the way to the homescreen and I can make a few selections before it turns off. After flashing the stock kernel and rom in odin I believe i am completely stock, however I do not want to chance sending the phone into Verizon. I believe that I saw a thread before this happened to me talking about having to calibrate the battery in some way and it had an item to flash in order to fix the problem. I can not find it now. Any ideas? Now that I can access recovery is there anything else that can be done? Why won't the phone recognize that it has a battery? As soon as I pull it off the charger it shuts off. When it is on the charger it appears to be charging and the green in the battery appears to be at about 80% but the level does not move up or down at all. Thank you for your help ahead of time.

[Q] Please help my sony won't boot up

I'm using sony xperia V and after flashing a cyanogenmod rom which installed perfectly, until I select reboot and the screen
turns black and no matter which button combination or whatsoever I can't boot up.
The only things that happen is:
if unplugged, pressing the power button will vibrate the phone and green LED flash for a second
if plugged into computer the green LED flashes for a long time. Holding the volume+ button before plugging in will flash a blue LED light for some time
Both plugged and unplugged, the screen shows nothing at all, which means can't enter recovery mode, safe mode or download mode.
Is there anyway I can solve this? Or I can only buy a new phone or act dumb at the sony store.
Thanks in advance and sorry for any trouble
[Edit]I finally found a way to solve this problem after hours of frustration. Thanks to this amazing website which I couldn't post it here due to being a new member, which I could say it's from a website named androidgadgetmatic, really turned a completely useless brick into a perfectly working phone again. The only problem left (which happened before bricked) is that my phone couldn't read or even find SD card, any help in this area guys?

Moto G XT1032 - Can access Fastboot, but it wouldn't work - Bricked?

Hi. First of all, thanks for taking the time to read this. I know it's a long post, I'm just trying to be as detailed as possible.
I've a Moto G XT-1032 that stopped working a couple days ago. It has the original battery, original software. It didn't came with an original charger, so I have been using a Samsung Galaxy Tab one. The phone is almost two years old.
This is how it all started: It had low battery. When I got home it connected itself to the wi fi, and tons of whatsapp messages came at the same time. It went off.
I thought maybe it had drained the battery. Plugged it in to charge, didn't get the led on, and the battery showed 0% for an instant. Then the phone turned itself on, got the M logo and then the screen went black (like... some sort of backlight is on, but the screen is just black)
I turn it off, and it goes back on. No battery image, straight to the M logo, and then black screen. I tried holding power + vol down keys for more than 120 secs, finger pain is the only I got. It can access fastboot mode, but doesn't matter which option I pick, normal powerup, recovery, factory... I select them and then press vol up, but it just goes to the white screen with the M logo, then black screen.
When I plug the charger, and go to fastboot mode, it doesn't show battery charging. Just says battery low (or battery ok). When I plug it to the computer via the usb cable, and access fastboot, it shows battery charging.
The computer doesn't detect the device at all. First time I plugged it, it tried to install drivers, but failed. I downloaded them from motorola's page.
If I open motorola device manager, it tells me there aren't updates for my phone... So... I guess it's recognizing it? But I still can't see it. Windows only shows me my C and D drives, but not the phone. Tried different usb cables, different usb ports. Nothing changes.
I sent it to a service, they tested the battery and charging port, they said those were fine. But didn't find the problem.
Any ideas? Suggestions?
Thanks in advance!

Bootloop and Not showing up on ODIN

I was flashing new nougat king's rom for the s7 edge, however I forgot to untick autoreboot, and ofc, I got phone stuck in a bootloop....
I tried plugging it in, but PC doesn't recognize it at all, nothing like I didn't plug anything in, and OFC it doesn't show up in odin, that is the main problem.
Also I tried to force restart and enter recovery or download mode, nothing is possible, I restart with power+vol down, and when I switch buttons to power+home+ vol up (or down depends what I try to enter) nothing happens. I thought my timing may be a bit off, but I even used a stopwatch to know when it will restart and switch to another combination faster. I tried that many many times.... I saw somebody succeed here, but not me, should I let go of all buttons before pressing another combination? (I tried both anyways, but I am gonna keep trying)
Also my previous rom was note 7 rom, and I got a note saying that they will disable charging of my phone for last few days. I don't know how they are doing it, over OTA update or what?
Phone is Always on now showing "Samsung Galaxy s7 edge powered by android" i can only restart it, I don't know if I should let battery drain and phone turn off, because if I could turn it off, I am sure I would be able to enter recovery or download mode, but I don't know if it will charge when battery is empty, because of that "update" samsung is trying to push to note 7 phones.
Sry for the length, but I stated most things this way, pls help, thanks!!!!
OFC I forgot something, when I plug it in the wall, I don't think it is charging, no led light showing that it is
neky92 said:
I was flashing new nougat king's rom for the s7 edge, however I forgot to untick autoreboot, and ofc, I got phone stuck in a bootloop....
I tried plugging it in, but PC doesn't recognize it at all, nothing like I didn't plug anything in, and OFC it doesn't show up in odin, that is the main problem.
Also I tried to force restart and enter recovery or download mode, nothing is possible, I restart with power+vol down, and when I switch buttons to power+home+ vol up (or down depends what I try to enter) nothing happens. I thought my timing may be a bit off, but I even used a stopwatch to know when it will restart and switch to another combination faster. I tried that many many times.... I saw somebody succeed here, but not me, should I let go of all buttons before pressing another combination? (I tried both anyways, but I am gonna keep trying)
Also my previous rom was note 7 rom, and I got a note saying that they will disable charging of my phone for last few days. I don't know how they are doing it, over OTA update or what?
Phone is Always on now showing "Samsung Galaxy s7 edge powered by android" i can only restart it, I don't know if I should let battery drain and phone turn off, because if I could turn it off, I am sure I would be able to enter recovery or download mode, but I don't know if it will charge when battery is empty, because of that "update" samsung is trying to push to note 7 phones.
Sry for the length, but I stated most things this way, pls help, thanks!!!!
Click to expand...
Click to collapse
Forced close mode
Vol up and Vol down and Power
Then use Samsung Jig to force Download mode

Htc A9s problem

Yesterday in my phone the battery discharged and turned off. Connected to the charger charged up to a few percent, unfortunately I wanted to show something on the phone, I detached it for a moment from the charger and again off. And now the crux of the problem. On the power button zero reaction, I wanted to make a hard reset by VOL- and power button, the phone reacts, the HTC logo pops up, but the menu is no longer (blue flickering screen) so I have no access to this menu. I read about uploading a clean software by RUU, but for this you need to enable fastboot mode or download mode, it is like the option of uploading the software via ruu via the exe file, but unfortunately I can not find it on my model. I will add that after I plug in the phone to the computer still shows information about the unknown device. Any advice, ideas ? I'm fresh on these issues. Sorry for my bad English.

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