Solved! How to fix blank/ black screen on Samsung galaxy s3 if the methods above doesn't work

Dec 3, 2018
My new Samsung Galaxy s3 is having a black/blank screen phone is fully and the battery is not damaged , it has never been dropped or came in contact with water ... when I power up my phone there's only the Samsung sound but the logo doesn't show up , once it's on messages, calls and notifications come in but there's no display ... I've tried every method online from " technicians" but nothing works...some say it may be a hardware problem but my phone is new ...NEW!!! please help .... I'm really frustrated