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Hello I have just repaired the daughter board on an Samsung S6 G920F however the screen is not powering on and it isnt being detected by the computer either. I am confident everything is connected correctly as I have uplugged and plugged everything back in a few times. I have also done a soft reset on the phone. The battery is charging when plugged in as the voltage has increased and the battery gets warm. Any help would be appreciated. Thanks :)

The computer should show the phone as a mp3 player. You cannot allow file transfer without the display. Also, it could be that you bumped the display ribbon.