After my s21 had the black screen issue where it buzzed and I could get touch sounds I opened it up and reseated the display ribbon cable. It worked but it i tapped it too hard it would loose power. I tried resetting the battery connector but when I tried putting it back on I touched the side of it and it made a frying sound. After I got it connected properly it did not work at all. I tried plugging it in. Nothing. I listened to the power supply and it changed pitch. I disconnected the battery and the power supply pitch changed again. So is the board fried? Would it be possible just to change a fuse or capacitor? Maybe replace the power ic? Or do I have to get a new logic board?
After my s21 had the black screen issue where it buzzed and I could get touch sounds I opened it up and reseated the display ribbon cable. It worked but it i tapped it too hard it would loose power. I tried resetting the battery connector but when I tried putting it back on I touched the side of it and it made a frying sound. After I got it connected properly it did not work at all. I tried plugging it in. Nothing. I listened to the power supply and it changed pitch. I disconnected the battery and the power supply pitch changed again. So is the board fried? Would it be possible just to change a fuse or capacitor? Maybe replace the power ic? Or do I have to get a new logic board?