Galaxy A7 2018 display won't turn after timeout

[Android Central Question]

Yesterday I replaced the broken glass back of my Samsung A7 2018. I did it myself because it's actually really easy. Everything works fine but the screen of my phone won't turn back on again when I press the power button after a timeout or when the phone is locked. Both the button and the display still work so I think it's a software issue but I'm not 100% sure. So far I've tried to update and factory reset the phone but didn't work.

Do you guys know how to fix this?

 

[methodman89]

Everything works fine but the screen doesn't come on could be a problem with the digitizer, or a couple of things. A repair shop would be prudent. Good luck

 

[Mike Dee]

Did the problem start immediately after you did your repair?

 

[Yannick Geudens]

When I turn the phone on the display works completely normal but when it goes to time-out it doesn't go back on.

 

[Yannick Geudens]

Yes, I didn't use it after the repair but the day after when I turned it on for the first time it strarted doing this.

 

[Mike Dee]

Sounds like something is wrong with the power button even though it still works to turn it on. Could be a loose connection or something out of alignment that happened as a result of taking ot apart. Unless it's just a coincidence.