I have a lenovo yoga slim 7 carbon 14acn06 computer. The first bios version I used normally was H5CN08WW.T01. However, I could not find this version on the lenovo homepage. I updated to version H5CN42WW and the touchpad, speaker, and mic had errors. Then I flashed the bios mod version again, but now the computer does not display the screen. Can anyone help me? The S/N of the computer is currently empty xxxxx...