Why my phone is flickering and turns off after software upgrade?

[AC Question]

After software Upgrade my phone starts to have a flickering screen and turns off , today starts to make a beep!!!!

Please help i bought it 12 months ago onlyyyy

Samsung Galaxy S5

 

[dpham00]

I would try to do a factory data reset

 

[GalaxySuser]

If developers options is on, turn it off, helped my problem with flickering screen on S3

 

[GalaxySuser]

If developers options is on, turn it off, helped my problem with flickering screen on S3 !