i have fried my wifes samsung note 4 please help!!! - General Questions and Answers

I recently bought a used galaxy note 4 for my wife, the phone was bought from a tech guy that worked in a Samsung store.
the phone had been loaded with the note 7 firmware, this was a little glitchy and began crashing the phone.
I assured my wife that I was able to flash the stock software back to the phone, I have done this before on other phones and tablets etc.
the software flashed across with no issues and the phone worked fine..... until my wife restarted the phone, it wouldn't boot up until I removed and replaced the battery, assuming that there was a glitch with the firmware I factory reset and wiped the partition again then re flashed the stock firmware, again the phone worked fine and sailed through the initial set up, once it was up and running I tried to reset the phone to test it.........
now the phone wont turn on, it wont charge, it wont boot in recovery or safe mode.... I have had the battery in and out many times and have held the power button with the battery out to discharge power......
the phone is dead! is there any way back from this or do I accept I need to start looking for a new phone for the wife!!!

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S7 Freeze and Boot Loop. Tried Everything.

Switched phone on after work, phone powers up, boots up and then freezes after around 20 secs then switches off and re-boots, the process then starts again over and over again.
I've tried deleting cache, master reset, safe mode, simulated battery reset which does not work. I let the battery run flat by putting the phone into download mode and then recharged the battery but still nothing. The phone seems stable only in download mode.
I managed to re-install stock 7.0 firmware via Odin. Firmware installs fine, phone boots up and then freezes on welcome screen and then boots up again. I then tried 6.0.1, again installs fine, I get the welcome set up screen but after a 20 odd secs freezes up again.
The phone is less than two years old. Samsung service centre warranty job? Thanks.
Yes. Mine had also freezing and reboot issues, Sammy changed the Mainboard
The phone is less than two years old. Samsung service centre warranty job?
Click to expand...
Click to collapse
Same problem after 5 months.
Yes get it back to service centre
guys this sounds like the same issues the lgg4 was having with the ilapo bootloop also a snapdragon
had bad solder points on the big cores and they would come loose over time and basicly the phone was stuck in a infinite loop

NEXUS 5 completely dead

Hi there, my google nexus 5 has completely dead. Yesterday i was using my phone and it shutdown itself. Now i'm not able to charge or turn on the phone. No bootloop, no logo, no sound, nothing... If i connect the phone to pc windows is not able to recognize the hardware, no windows sound, no bootloop on the phone, no life signal. There is any way to fix the problem? Thanks
Try opening the phone, disconnect the battery for a few minutes, reconnect battery, connect to a charger and look for a flashing red led. Don't try to turn on the phone during this process.
I opened the phone, when i connect a charger i can hear something like an imperceptible click noise... and the logic board become hot:crying:
I had this issue recently. The phone was not turning on like you mentioned.
I was able to enter recovery mode (hold power + volume down for few seconds)
Once in recovery I wiped cache. Now the phone turns on.
I still get sudden restarts with heavy use. But at least the phone turns on now.
I took the phone to a phone repair kiosk. He told me he had 3 customers complaining of similar issues with their Nexus 5 and that he was unable to fix it.
I'm with Rogers, latest firmware, stock, locked bootloader.
erryday said:
I had this issue recently. The phone was not turning on like you mentioned.
I was able to enter recovery mode (hold power + volume down for few seconds)
Once in recovery I wiped cache. Now the phone turns on.
I still get sudden restarts with heavy use. But at least the phone turns on now.
I took the phone to a phone repair kiosk. He told me he had 3 customers complaining of similar issues with their Nexus 5 and that he was unable to fix it.
I'm with Rogers, latest firmware, stock, locked bootloader.
Click to expand...
Click to collapse
one day we will discover google has been killing older phones with updates once pixel was released, lel. jkjk
I just talked to LG Customer service. He told me the whole logic board needs to be replaced. Which would set me back $150+tax and downgrade my storage to 16Gb. No thanks.
I was hoping for a workaround, like installing a custom kernel with specific settings.
I have already tried factory reset, switching to LineageOS, removing sim card. Nothing helped.
Underclocking with Elemental X Kernel seems to be the best workaround so far.

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I have not attempted to root the phone. It has been unlocked by att for a year or more and has always worked fine until a few days ago. How can I fix this? Will my phone still be unlocked if I have to redownload the software?

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