Sir, my hp desktop PC is having -- windows10, Firefox, connect cable Broadband with 100mbps speed, Ethernet, periodically updated. I am very much fond of watching English/Foreign language movies having English CC/Subtitles, online streaming, generally on paid channels e.g. Netflix, prime video, Hotstar, you tube etc. I am not proficient in English language. To read the English CC/subtitles, I have to pause the streaming, read the subtitle and then start the streaming (pause-start, pause-start). After about 15 minutes watching the film, the screen becomes black (no video), with a no signal detected message. But audio/sound remains continue. Then I switch off the PC, restart it, and watch the movie for next 15 minutes., then again black screen.This cycle goes on. But When I watch the film continuously, without pause-start function, then there is no black screen problem. In my opinion this repeated pause-start function causes the black screen problem. Without pause-start function, I cannot watch these movies. I tried some online mentioned solutions without success. Please help me in solving this problem in a simple way as I am not perfect in computer science. Regards.