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    Black screen after upgrade Clover 4920 to 5141

    Hi all, I have tried to upgrade my EFI of Clover 4920 to 5141 to prepare for an upgrade from Mojave to Big Sur. But after I replace the new EFI (Clover 5141) the current system running Mojave is stuck at black screen after boot without any errors. Even I have tried to replace the EFI with a...