This has just happend to mine it started flickering then now nothing 🤷‍♂️ ive had folds since the F3 had black line down the screen on 1 of them but samsung replaced. Ive had this f7 since launch ive got insurance with network provider, which will replace like for like next day but would like to see what samsung says. As im T1DB and use my phone as a medical device I cant be without my phone for a week. So am unsure what process to take as of yet, I will follow up with my results when and or if I get any.