Lenovo Ideapad L340-17IHR # Serial number update

[bociub]

Hi there

After a failed repair, I just simply bought a new motherboard from china. It is identical, it is working.
However things like mtm, serial number, and model number are not set. I already tried a couple "lenovo golden keys" but non of them had acces to "smi(?) interface", so the informations are remained unchanged.
Does anyone knows a working solution for this particular laptop?

Thanks
B.

[rogfanther]

Transplant the bios chip from the old board ? If the information is in it / DMI area, it should carry over to the new board.