ASRock P55 Extreme - Black screen when booting

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   Hello, 

Each time I need to reboot my computer, it stays on a black screen, it never shows anything. I need to stop the computer, wait for one or two hours, and after it starts again showing something on the screen. 

Have you any idea why ? And any idea how to resolve it ? 

My spec : 
OS : Win10 Pro
CPU : I5 750 Lynnfield Technology
RAM : 12 Go Dual Channel DDR3 
Motherboard : ASRock P55 Extreme
Graphic card : GTX 560 TI

The version of the BIOS : American Megatrends Inc. Version P2.70 .

What I did until now : I Change the RAM, the Graphic card, change the battery of the CMOS battery. 

Thank you very much by advance for your help ! 

Seb

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Seb Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Apr 2020 Status: Offline Points: 7	Post Options Post Reply Quote Seb Report Post Thanks(0) Quote Reply Topic: ASRock P55 Extreme - Black screen when booting Posted: 12 Apr 2020 at 3:58am
	Hello, Each time I need to reboot my computer, it stays on a black screen, it never shows anything. I need to stop the computer, wait for one or two hours, and after it starts again showing something on the screen. Have you any idea why ? And any idea how to resolve it ? My spec : OS : Win10 Pro CPU : I5 750 Lynnfield Technology RAM : 12 Go Dual Channel DDR3 Motherboard : ASRock P55 Extreme Graphic card : GTX 560 TI The version of the BIOS : American Megatrends Inc. Version P2.70 . What I did until now : I Change the RAM, the Graphic card, change the battery of the CMOS battery. Thank you very much by advance for your help ! Seb