Radeon hd 4800 wont register WTF?

i have a ati readeon hd 4800 graphics card running windows 7 ultimaet x64 the card worked before and now it wont register in the pci e in device manager it doesnt show up i ran scan for hardware changes and i get nothin the fan spins on the card so its getting power
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More about radeon 4800 wont register
  1. just shut down take card out blow it off with a can of air dust the inside of case replace card and reboot and reinstall drivers.
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