boot problem

[bugraduz]

when ı power on my thinkpad , ı see only black screen after lenovo logo . Opencore boot menu cant show. what is the problem ?

[gilberth]

Are you booting from a usb stick?

[pierpaolodimarzo]

Boot from USB, after configure the bios and Reset NVRAM

[bugraduz]

NO, ı copy the efı folder in to my efı drive

[pierpaolodimarzo]

At the first use USB Boot, After "Reset NVRAM" and after put the EFI in drive.