GPU not detected after bios update Acer aspire E1-571G

[wael47]

Hello guys,

I try to update my bios from 2.04 to 2.21 after finish my gpu not detected (Nvidia 710M) anymore the performance of my pc decresed slowly startup i was not able to play games  even my processor was Intel i7 , only the intel 4000 was detected in the Device Manager i found a solution to downgrade it to 2.04
but nothing gpu dosent back working , please guys if any one face this problem before or if you know a solution let me know three months im trying to find a solution 

In Bios it shows something like this : Vga Bios Version (Peg) none

[wael47]

Hello,
After downgrading and unlocking my bios i changed the vram of Intel HD 4000 from 64 to 1024 after press F10 and saving my pc opened with black screen , run for 5 seconds with black screen and restart he runs into circle please guys if anyone know how to fix im very tired and im searching i have many problems with this pc i hope you guys can help , Thanks.