i think you may need a new LCD
[link|https://www.walmart.com/ip/LCD-Display-Touch-Screen-Digitizer-Assembly-Replacement-for-Samsung-Galaxy-S5-Black/193411413?wmlspartner=wlpa&selectedSellerId=101049530&adid=22222222222046727624&wmlspartner=wmtlabs&wl0=e&wl1=s&wl2=c&wl3=74973098221326&wl4=pla-4578572627937383&wl5=&wl6=&wl7=&wl10=Walmart&wl11=Online&wl12=193411413_10001068906&wl14=samsung%20galaxy%20s5%20lcd%20replacement&veh=sem&msclkid=4cb3908088751fbcd57af3e266e8d2da&gclid=4cb3908088751fbcd57af3e266e8d2da&gclsrc=3p.ds|https://www.walmart.com/ip/LCD-Display-Touch-Screen-Digitizer-Assembly-Replacement-for-Samsung-Galaxy-S5-Black/193411413?wmlspartner=wlpa&selectedSellerId=101049530&adid=22222222222046727624&wmlspartner=wmtlabs&wl0=e&wl1=s&wl2=c&wl3=74973098221326&wl4=pla-4578572627937383&wl5=&wl6=&wl7=&wl10=Walmart&wl11=Online&wl12=193411413_10001068906&wl14=samsung%20galaxy%20s5%20lcd%20replacement&veh=sem&msclkid=4cb3908088751fbcd57af3e266e8d2da&gclid=4cb3908088751fbcd57af3e266e8d2da&gclsrc=3p.ds|new_window=true]