01-17-2020, 11:44 AM 
(This post was last modified: 07-13-2021, 01:26 PM by Maxinator500.
 Edit Reason: solved finally
)
		
	
	
		Hello!
I wasn't able to pass signature check after flashing modified BIOS using InsydeFlash. It bricks my device, but I can recover the system with HP tools.
Insydeflash621_Customized.zip unsigned update/rollback is allowed.
I managed to successfully modify my sp86776 BIOS using the programmer.
![[Image: IMG1.jpg]](https://i.ibb.co/nf0JhvM/IMG1.jpg) 
 ![[Image: IMG2.jpg]](https://i.ibb.co/8B5Gbtx/IMG2.jpg) 
	
	
	
	
I wasn't able to pass signature check after flashing modified BIOS using InsydeFlash. It bricks my device, but I can recover the system with HP tools.
Insydeflash621_Customized.zip unsigned update/rollback is allowed.
I managed to successfully modify my sp86776 BIOS using the programmer.
![[Image: IMG1.jpg]](https://i.ibb.co/nf0JhvM/IMG1.jpg) 
 ![[Image: IMG2.jpg]](https://i.ibb.co/8B5Gbtx/IMG2.jpg) 
	
 
 



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