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Black screen for 3 minutes (UHD630)

Joined
Dec 21, 2018
Messages
22
Motherboard
Dell G3 3779 Laptop
CPU
i5-8300H
Graphics
UHD 630
Mac
MacBook Pro
Mobile Phone
iOS
Hi I want advice on the black screen that when booting. after three minutes the picture jumps up and the system goes perfectly. I found out when I turn off the laptop it doesn't do that. dale i have problem with usb if i wake up laptop from sleep so flash drive works but dongle usb to wireless mouse not. I want to sort it out somehow. please help. Configuration is Dell G3 i5 Coffee Lake. the graphics work fine for me with is installed.

Thanks
 
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