Lenovo T490 - motherboard serial - windows licence lost - after corrupt bios chip replacement

[baletak]

Hi,
had T490 with faulty bios chip. Bought chip out of ebay and soldered on. Laptop starts and works however serial numbers of laptop and motherboard do not match.
I have updated laptop model number.

1) I did not find the way to update laptop serial number - I have this one.
2) I dont know where to get my motherboard serial number and how to update it. Is it somewhere physically on the mainboard? How do I update it?

Hope to find someone to help me with this as I am hitting dead end at the moment.

Many thanks

Miro

[baletak]

UPDATE> I was able to find laptop serial number as well as motherboard serial number (there is a sticker on motherboard with long number and 3QR codes) through lenovo utility disk 2.02

I however still dont have my WINDOWS licence back ... any ideas?

[SMDFlea]

UPDATE> I was able to find laptop serial number as well as motherboard serial number (there is a sticker on motherboard with long number and 3QR codes) through lenovo utility disk 2.02

I however still dont have my WINDOWS licence back ... any ideas?

Post your bios backup here after you`ve updated your DMI info.

[baletak]

UPDATE2> I have managed to extract windows licence key from old bios chip. Is there a way to insert licence key back to BIOS?