Оригинальный сообщение: DouglasVinicio ,
Before taking any conclusions you must disassembly the screen and take a look what it looks like on the inside. 1 - Check if the flex cable is still conected. 2- If it is conected try a new screen or a old one that you are sure that is working. 3- If doens’t work check for dammaged conector or components (capacitors,diode,etc) around the touch screen conector. 4-If everthings ok maybe you’re facing a Touch iC issue. Then you need someone with the skills and the tools to do the job. Answering your question about OEM parts,i can only tell you about my experience. I neved had any problems working with not original iPhone parts,I installed many iPhone 6s screens not original ones most part and never had this kind of problem caused by a bad part so i thinks is unlekely. And if the repair shop charged you 100$ without aven disassemble the phone and had done a complete diagnosis i would say find yourself another professional to take care of your phone.