Hello, I am sending you a video on how to do it and the file you need....

Hello, these BIOSes are 100% compatible with AMD CPUs. This means you have a different issue.
You can try these steps.
1- Try using an external monitor.
2- Shine a bright light on the screen and see if there's any image on the screen. This could be a backlight issue.
3- If you have a graphics card, the problem could be related to that.
4- If you have an SVOD 4 programmer, program the IO EC. I have the EC BIOS in my post. You can download it from there.
5- Test the LVDS EDP cable connected to the display.
6- Remove the battery and adapter and hold down...

gs450&gs550&gs750 nm-c821 EC Bios bin

AMD % 100 ok...