Screen does not wake up. Any guesses?

[BluesJunior]

Hi guys. I've bought an E5 just two days ago and I faced with a problem during this time. When I locked my screen, it does not wake up back after a while. But phone still works, led notification light responds. Only thing does not work is screen. 

I overcame this problem by pressing power+vol up+vol down buttons about 20 sec at the same time. But today I've experienced it again. I was using Greenify, I deleted it today. 

Any guesses for reasons of this error? Any long-time solutions?

[Emil]

Hi @BluesJunior, welcome to the forum!

I'm sorry to hear you are experiencing this your Xperia E5.

If you are still experiencing this with your device after you've done a force restart (volume up and power button) I would recommend that you try and temporarily remove any SD- and SIM-card to see if they may be causing this behavior.

I would also recommend that you try and reboot your phone to safe mode to see if this behavior is caused by one of your downloaded apps.

Let me know how it goes!

[BluesJunior]

I deleted Greenify, it helped. But when Stamina Mode is on it sometimes does not wake up. The phone is still alive, works properly but the screen does not wake up, it does not respond when I press the power button until I reset the device by pressing volume up-down and power button at the same time. Everything works other than the screen. 

I think there's something wrong with Stamina Mod.

In addition, I should say that I do not reset/turn off my phone too much. Is it advisable to reset the phone e.g once a week?