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Android fake overheating warning

I dropped my Samsung phone on ground, then it started giving me
false overheating warnings, it automatically turns off after a min. So i need to backup data before performing reset to phone.

Is there way to backup data? maybe by recovery
or download mode? Or way to disable warning temporary? Or any other solutions?

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Well as you mention that phone has been dropped or subjected to physical impact, this could be the cause of the faulty sensor. SO I will suggest you to Seek professional help which can help you in fixing the damage sensor.

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I had the same problem. The phone shut down on itself a few minutes after every restart.

The timeframe was just long enough to install a hardware-checking-app. From the readings in the app I learned that an internal temperature sensor shows 90°C straigt. Even just after rebooting an login, despite I cooled it down to about 4°C the fidge before.

After removing the back cover, unscrewing all screws and finaly remoing the bezel, I managed to regain a true temperature reading by sligtly pushing an knocking the PCBs. Then I located the faulty sensor on the SUB-circuitboard next to the USB-connector by applying cold spray. Unfurtunately replacing the SUB-circuitboard has NOT fixed the issue.

To get the phone charged again I connected an USB-charger with was not plugged into the wall. Then i checked the temperature reading in the app and made it changing from fake 90° to real 27°-32°. Then I put down the Phone verry gently on something cushionlike to avoid disturbing the temperature mesaurement by vibrations. Then I and plugged the preconnected charger into the wall.

After reaching 85% I disconnected the USB-charger and the flexprint connector to the SUB-circuitboard. That disabeld the faulty temperature mesaurement, so I had not to expect the backup process beeing interupted by "safety shutdowns". Unconviniently also the USB is inoperable, when the flexprint is disconectet. So I culd not connect the Phone to my PC directly. Luckily the M32 features a µSD-card-socket.

I installed the app "SmartSwitch" and then inserted a card of 128Gb into the matching cutout of the SIM-tray. ThenI let "SmmartSwitch" saving everything to the µSD-card. It took over one hour (and a decent percentage of the battery charge) to copy everything, but wit the disconected sensor no inerruptions occured.

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