Hi friends,

i have one problem. I am learning modified bios on my HP 4720s and i am using UEFITool. I have external flash programmer for eeprom, when i readed eeprom on the motherboard and this dump i have modded by UEFITool, then i wrote new modded bios to motherboard eeprom. After my laptop turn up, and laptop goes black screen and i dont know, what i do it wrong. My first project is change post Logo HP.

I am use UEFITool and edit it the original bios dump, i am search when is logo -> extract body -> replace body with new logo ... and save image.

Can you help me any body PLEASE, what I am doing wrong? I am very apologize for my English. I add to attachment my original bios dump, and my modded bios dump for HP 4720s.


Thank you very much for your help.