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Help me Display port black screen , but External Display work with HDMI

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can someone help, I have a problem with booting on macos catalina without the laptop's internal screen and black screen but when using an external display it works.

my Device :  

Toshiba Portege z10t 

2 in 1 laptop with dock keyboard 

intel i5 4300Y 1,6 Ghz Haswell ultra 

intel hd 4200  resolution 1920x1080

macOS Catalina 10.15.4

toshscreen not work 

audio work with voodohda

here my file 



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