Samsung Galaxy J3 (SM-J320FN) Android 5.1.1: Auto On/Off, Empty Memory Card Issue & Charging Fix

Hello,
Nothing happened, did not fall, was not flooded but yesterday there was a problem with my phone: first he stopped seeing the memory card claiming it is but empty and then suddenly started to automatically turn off and on, every few minutes a screen alternates logging in and after logging in turns off and on to the login screen. This phenomenon stops when it is connected to the charging either to the network or to the computer. As long as all functions work, it seems to work. The battery has been charging normally so far, it did not discharge excessively quickly, now the condition is about 90%
model number SM-J320FN version of Android 5.1.1
Please help.

For starters, restore to factory settings, as it will not help to upload Odin new ROMU.

leonov wrote:

For starters, restore to factory settings, as it will not help to upload Odin new ROMU.

restoring settings or losing everything that is later like this? Will just copying to a computer drive help in later restoring settings, calendar data or phone book?
what does it mean to rip new Rom away?

puchatek1964 wrote:

Will just copying to a computer drive help in later restoring settings, calendar data or phone book?

Do not have a copy in the google cloud ??

puchatek1964 wrote:

what does it mean to rip new Rom away?

That's what I wrote, uploading a whole new ROMU (system), to the phone with the Odin program.

[Quote = "Leonov"]

puchatek1964 wrote:

Will just copying to a computer drive help in later restoring settings, calendar data or phone book?

Do not have a copy in the google cloud ??
Well, I do not have copies in the cloud, because generally I do not like to play too much in the ether, it can always dissolve somewhere - I only believe in particulars. If it were not for the technology that makes life easier, I would remain in the analog world. I can create a cloud while the phone is working but it's not something I do every day

Is the phone turned on after inserting the battery? If so, check / clean with brush IPA switch on and USB connection.
If you do not turn on yourself, you should restore the factory settings / wipe by recovery menu or make a softa.

the matter was solved - the problem was the memory card that apparently had been damaged. After it was removed, everything returned to normal.