Some of HTC One M9 users report that they got problem to their HTC One M9 screen appearance. They find that their HTC One M9 screen is black and nothing is showing up.
This is quite serious because if your HTC One M9 screen is black, you cannot do anything with your phone because you cannot see anything appear at the screen. You have to fix your problem immediately so that you can use your HTC One M9 like how is it used normally.
The following explanations are some options that potentially can be the solution of this kind of problem. Please read and follow the instruction carefully to get your HTC One M9 back to normal.
One of potential solution to overcome your problem is by taking the option to wipe cache partition of your HTC One M9. You can wipe cache partition of your device by these following steps.
Please turn off your HTC One M9 and please hold the Power off, Volume up, and the Home button together for several second. You will see your phone starting to recovery mode after it vibrate once.
Please use Volume button to highlight “Wipe Cache Partition” option, and to select it please press the Power button.
You’ll get a confirmation dialog asking if this is really what you want to do, please highlight Yes using the Volume down, and use the Power button to select it. When the process is complete, you can select Reboot System now to reboot your device.
Other option to overcome this problem is by taking the option of factory reset to your device. Please do not forget to back up all of your important data because it will erase all of the files in your phone.
You can reset your device by opening the Settings > User and Backup, then select Backup and Reset, then choose Factory data reset. After ensuring that all your important files is already saved by backup files, please select Reset Device then Delete all.
The device will be on progress to reset and it will reboot. If those options are not working, please ask some help to technical support.