a mysterious issue!!!

[PARSA7899]

hi there
i was working with my cellphone(galaxy j7 pro) yesterday and suddenly the screen got black!! i was freaked out and i pushed home/power buttons but nothing changed i thought my phone LCDhas been damaged but suddenly the light came back and everything get back to normal i was very happy at that time but the suddenly the screen got dark again!! you don't believe but it was a cycle ,a cycle with irregular and random timing!
at a time my phone screen got black and my buttons(home,recent,back,power) were lock but at another time every thing was normal and my phone worked properly! but sometimes i had button lock without a dark screen! i mean "sometimes"(the time was random) i could even type at my phone and the touch was ok but my recent key+home+back key(not power key) were locked!
i thought it was form software so i reset my phone to factory data but it didn't work
so i flashed my phone i mean i reinstalled the software completely but it didn't work either
i got shocked and depressed i thought at 1 percent it could be from my lcd so i changed my lcd and nothing happened and there was no difference
i need help what could it be? it's definitely from hardware?could it be for my button sensors?could it be because of wetness? i would be glad if someone gives me a clue for this thank you all guyz

 

[Dannydet]

Maybe you shouldn't use a cellphone?

 

[PARSA7899]

no

 

[ocnbrze]

OMG @Dannydet !!!!!!!!!!

well it can be two things a software issue or hardware.

a factory reset usually will fix most software issues and double that with flashing software....rules out the software issue.

so the option left is hardware....which you will either need to get it fixed or replaced.

 

[dksksks]

i have this same problem with mom's Caixa tem my mom uses a Samsung j3

 

[dksksks]

ghost apps how to solve
once upon a time a was working until itndisplayed a ads and apps once i rooted my j2 core i thought is root but no! i tried unrooting did'nt solve installing roms did'nt spsolve what to do

 

[ocnbrze]

ghost apps how to solve
once upon a time a was working until itndisplayed a ads and apps once i rooted my j2 core i thought is root but no! i tried unrooting did'nt solve installing roms did'nt spsolve what to do

what issue? black screen? ghost app? is the phone still rooted? what is exactly going wrong? just remember the more details you give us the better we can help.

 

[dksksks]

That is the Ghost apps they are (noname) apps