BIOS Dell OptiPlex 9010

I do not have a backup of my original BIOS, so I directly flashed the BIOS dumped from another mainboard of the same model. Now I have a new problem: the onboard network adapter displays an exclamation mark. I need to disable and re-enable the network card each time to get the network working again. I have fully reinstalled the system, yet the fault remains. Is there any solution to this issue?
 
I do not have a backup of my original BIOS, so I directly flashed the BIOS dumped from another mainboard of the same model. Now I have a new problem: the onboard network adapter displays an exclamation mark. I need to disable and re-enable the network card each time to get the network working again. I have fully reinstalled the system, yet the fault remains. Is there any solution to this issue?
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