How To Fix HTC U12+ Does Not Turn On

The #HTC #U12+ is a premium Android smartphone released last year which offers several outstanding features to consumers. This device sports a 6 inch IPS LCD display which is great to use for viewing various multimedia content. Under the hood is a snapdragon 845 processor which when combined with 6GB of RAM allows the device to run apps smoothly. Although this is a solid performing device there are instances when certain issues can occur which we will be addressing today. In this latest installment of our troubleshooting series we will tackle the HTC U12+ does not turn on issue.

If you own an HTC U12+  or any other Android device for that matter then feel free to contact us using this form. We will be more than happy to assist you with any concern that you may have with your device. This is a free service we are offering with no strings attached. We however ask that when you do contact us try to be as detailed as possible so that an accurate assessment can be made and the correct solution can be given.  

How To Fix HTC U12+ Does Not Turn On

Problem: Hello, I am having trouble turning my HTC U12+ on. This morning I went to unlock it and the screen would not power on. After attempting to turn on the device several times, I concluded that maybe the phone was dead. However, this was not true as I charged it completely last night. So, I went and plugged it back to the charger and attempted to turn on the device again and it would not power up still. Then I decided it might be the charger so I tried a power bank and it was “charging”. It showed that it was at 96% but when I attempted to power the phone, the screen went black and would not turn on. I then went to unplug it from the power bank but the phone did not want to let go of the power bank (I’ve never experienced this before when using the power bank). When I managed to unplug it I noticed the charging port on the phone smelled like it was burned. I am not sure but I’m leaning towards the battery burnt out? The charging port itself seems like it was damaged (almost like it exploded?). The phone is still intact so I’m not sure what to think. I am sorry for the long message but I’m hoping to figure out the problem and getting it resolved as I have a lot of personal information and pictures on my device that I would not want to lose. Thank you in advance.

Solution: From the way you described the problem this already looks like it is caused by a faulty hardware component. There are however a couple of troubleshooting steps you can perform first before bringing the device to a service center.

You should first clean the charging port of the phone using a can of compressed air. Make sure to remove any dirt or debris that could be stuck in this port. Once this is done charge the phone using a charging cord and wall charger that has been tested to work on another device.

Once the battery has sufficient charge perform the following steps listed below.

Perform a soft reset

The first thing you need to do in this case is a soft reset which is usually performed when the phone is unresponsive but should also apply in this case as the software will be refreshed.

  • If the display is off, press the POWER button to turn it back on.
  • Press and hold the POWER button, and then tap Restart.

Check if the phone will turn on.

Start the phone in Safe Mode

There are instances when an app you downloaded can cause issues on the device. If an app is not properly optimized it might use up a lot of battery life causing this battery drain problem. To check if it is an app that is causing the problem you should try to start the phone in Safe Mode.

  • Turn off the phone.
  • Press the POWER button to turn the phone on.
  • When you see the HTC logo on the screen, press and hold VOLUME DOWN until you see Safe mode at the lower portion of the screen.

If the phone turns on in this mode then it could be caused by an app you downloaded. Find out what app this is and uninstall it.

Wipe the cache partition of the phone

The phone system cached data is used to speed up the access to your phone apps. Sometimes this data can get corrupted which results in issues occuring on the device. To check if a corrupted cached data is causing the problem you will need to wipe the cache partition of the phone from the recovery mode.

  • Turn the phone Off
  • Press and hold “Volume down” then press and release “power”
  • After the black screen with red and blue text, release the volume key
  • In the menu, press “Volume down” repeatedly to highlight “Reboot to bootloader”
  • Press “Power” to select the option
  • In the bootloader menu, use “Volume down” to highlight “Boot to Recovery Mode” and press “Power”
  • Once in Recovery, press “volume down” to highlight “Wipe cache partition” and press “Power” again to confirm
  • At the “Reboot system now” highlight press “Power”

Try to check if the issue still occurs.

Factory reset the phone

One last troubleshooting step you should do is a factory reset which will revert your phone back to its default settings. Take note that your phone data will be deleted in the process.

  • Turn off your phone by pressing the Power key for a few seconds.
  • Press and hold “Volume down” then press and release “power”
  • After the black screen with red and blue text, release the volume key
  • In the menu, press “Volume down” repeatedly to highlight “Reboot to bootloader”
  • Press “Power” to select the option
  • In the bootloader menu, use “Volume down” to highlight “Boot to Recovery Mode” and press “Power”
  • In this mode select “Wipe data / Factory reset” by using Volume keys to scroll down and the Power button to confirm that.
  • Then choose “Yes–delete all user data” and press the Power key once.
  • When Recovery Mode pops up select “reboot system now” with the Power button.

Once the reset has completed do not install any apps in your phone just yet. Try to check first if the phone turns on. In case it does not then this could already be caused by a faulty hardware component, possibly by a damaged battery. The best thing to do right now is to bring the phone to a service center and have it checked.

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Chad Buenaflor

Chad has been in the tech industry since 2000. He has a degree in Electronics Engineering and is interested in the hardware and software side of technology. Initially working for a Japanese semiconductor company as a Test Engineer for nearly 10 years, he then pursued his passion for internet technology by working for the support team of Time Warner Cable then finally joining TheDroidGuy as one of their troubleshooting and tech writers. On his free time he plays his favorite games on his PC, Xbox Series X, and Android phone. Contact me at Email

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