Black screen but can feel the touch

hello , I've dropped my oneplus one on the floor at a bar , so the screen got broken and a lit bit of alcohol went inside , i changed the screen and then everything was good except when i got a message or any notification while my telephone is locked , it stays black ... i still can use it but without seeing anything . if i reboot my telephone (forced reboot ) i can see everything again till i lock and receive a notfication .... please someone got the same problem or now a solution for this ? thank you