AMD Graphics hardware not found

AMD Radeon HD 7700 GIGABYTE

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Used my pc for a day the next morning while booting it up, black screen only when I used VGA to connect to motherboard there were no AMD drivers and when I try to install them it shows me 6541ee1c11fc47f3b5287b12db01d05d.png

and whenever I try to use GPU it's just a black screen and no response(monitor goes to power saving mode)

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not a computer goddess ( i do not understand sheet)

help me, please