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Samsung Galaxy S7 displays notification that CPU is too hot to charge, device is frozen [Troubleshooting Guide]

Charging issues are among the most commonly reported concerns. In fact, we have received quite a lot of complaints in our inbox from our readers requesting assistance for some power-related issues. Among those who contacted us are Samsung Galaxy S7 owners. Needless to say, charging problems also occur in high-end devices and flagships because most of the time, these phones pack so much muscles they need to have stronger power source.

In this post, I will tackle a problem involving a Galaxy S7 that notifies its owner that its CPU is too hot to charge. The normal reaction of the person who encountered this problem for the first time would be to unplug the cable from the phone to stop the charging process and that’s what one of our readers did exactly. But according to him, the device froze and won’t respond. So, if you own a phone like this and are currently experiencing similar problem, then continue reading below as this post may be able to help you.

Read on to learn more about this issue but if you have a different problem, make sure you drop by our troubleshooting page for we have already addressed a lot of issues with this device. Find problems that are similar with yours and use the solution or troubleshooting procedures we suggested. We depend our troubleshooting guides on the information you give us so make sure you provide us with accurate details so we can give you more accurate solutions. Just fill up our Android issues questionnaire to contact us.

ALSO READ: How to fix a Samsung Galaxy S7 that’s not charging & other charging issues

Troubleshooting Galaxy S7 that got frozen after being charged

Problem: My Galaxy S7 had 60% battery life in it. While I was charging it, it said the CPU was too hot to charge. So, I unplugged the charger from the phone and tried to turn the phone off.  However, it froze with the “power off” and “restart” screen. It’s been frozen on that screen for 2 hours. I have tried to restart, turn off, etc, but it remains frozen.

Troubleshooting: Overheating issue is common not just in Samsung smartphones but to all devices that runs Android operating system. But if it overheats while connected to the charger, then there might be other factors triggered it. Here are the possibilities that caused the device to overheat:

  • There may be third-party apps that conflict the system and triggered the device to overheat
  • There are a lot of applications running in the background using too much RAM and CPU
  • Video streaming for several hours may have caused the problem
  • Launching some heavy apps for a long period of time may also cause overheating
  • Using the device while charging will also develop heat

ALSO READ: Samsung Galaxy S7 no longer charges normally after Android Nougat update [Troubleshooting Guide]

So, if one of these possibilities triggered the issue, here are the step-by-step procedures that you should do:

Step 1: Perform Forced Reboot

It might be due to several apps or tasks running in the background that the firmware could no longer perform perfectly and caused the system to crash. Through forced reboot the device’s memory will be refreshed and all unnecessary applications will be closed. I suggest you do this procedure to bring the phone back to life so you can continue troubleshooting:

  1. Press and hold the Power and Volume Down key together for 7-10 seconds.
  2. Wait until the device reboots.

Meanwhile, if the issue persists, then move to the next method.

Step 2: Boot it in Safe mode to determine if rogue app triggered it

In booting to this mode, the third-party apps will be disabled temporarily and only the pre-installed ones will run. If the device boots up normally, then try to charge it while it’s in this mode to know if the same error would show up. Assuming the problem doesn’t occur in this mode, then you have to find the app that’s causing the problem and uninstall it. Now, here’s how you boot your phone in safe mode:

  1. Turn your Galaxy S7 off.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.

But after restarting in safe mode and the device is still overheating or unable to boot up, proceed to the next method.

ALSO READ: How to troubleshoot your Samsung Galaxy S7 that doesn’t charge or charges very slow [Troubleshooting Guide]

Step 3: Delete the System Cache partition via Recovery mode

Occasionally, due to corrupted or outdated caches several issues may occur in your device like bootloops, freezing, unable to power on, etc. By simply clearing its cache directory, there is a chance that the issue will be fixed. There’s nothing to worry about though as this procedure won’t delete the important files and data you saved on your phone.

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Once the phone becomes active, try charging it again to know if the problem still occurs and if so, then move on to the next step.

ALSO READ: Samsung Galaxy S7 won’t charge and shows “Moisture detected in charging port” error plus other charging & power issues

Step 4: Perform Master reset on your Galaxy S7

Through this master reset, the firmware will be back to its factory default settings and all contacts, third-party apps, photos and important files and data will be erased. So, before you move to this method make sure that you back up all of them.

I also suggest you disable the Factory Reset Protection (FRP) so you won’t be locked out of your device. You must do this before you reset your phone…

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Cloud and accounts.
  4. Tap Accounts.
  5. Tap Google.
  6. Tap your Google ID email address. If you have multiple accounts setup, you will need to repeat these steps for each account.
  7. Tap Menu.
  8. Tap Remove account.
  9. Tap REMOVE ACCOUNT.

Now here’s how you reset your phone through the Recovery mode…

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

You can also reset your phone through the Settings menu…

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Cloud and accounts.
  4. Tap Backup and restore.
  5. If desired, tap Back up my data to move the slider to ON or OFF.
  6. If desired, tap Restore to move the slider to ON or OFF.
  7. Tap the back key twice to return to the Settings menu, then tap General Management.
  8. Tap Reset.
  9. Tap Factory data reset.
  10. Tap Reset device.
  11. If you have screen lock turned on, enter your PIN or password.
  12. Tap Continue.
  13. Tap Delete all.

After the reset observe closely if the problem still happening. If it still continue, just contact your the store where you bought it or contact your service provider and ask for a replacement.

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