Dell Latitide 5400 No sound, audio symbole error, 100% soluton

So after new updates from windows and the bios update the bios is not able to detuct the audio IC in the motherboard new bios dum programing also won't works so after i tried with 28 bios finally 29th bios i got the solution. Here is how to solve need to get the bios dump and need to edit the ME region we can extract from the oficial website bios version is 1.23.0 and after extracting we can merge with the bios dum so that we the audio ic able to detuct the bios and any os Realteck driver trust me it will work 100%.
Note:- In above explanation is only for the technicians not for the reguler people