Lenovo G710 restoring serial number after SPI flash

[Start1]

Hi folks,

i got a free Lenovo G710 which had symptoms of a corrupted or wrong bios (turning on with black screen and doing nothing). So i took my SPI programmer, made a backup of both bios and ec chip and flashed a dump that i found on the net.

The machine works fine now, but the bios information page shows:
Product Name: INVALID
Lenovo SN: INVALID
UUID Number: FFFFFFFF-FF[...]

The major problem is, that windows cannot be activated due to missing license information. Is it possible to restore the missing information? Maybe from the backup?

[Start1]

I made some progress, somehow. Played around with UEFITool and my backup dump. The first padding section contains strings that look like serial number and stuff. The third padding section contains a string that looks exactly like a windows key

In theory i need to extract those sections from my broken bios dump and insert them into the working one, and flash it again. In theory.. Is my assumption correct?

Which Tool do i need for that? UEFITool lets me dump, but not insert.

[Start1]

I can't believe it, i had no idea what i'm doing, but it actually worked

I dumped the padding sections from my backup with UEFITool. It gives you the hex offsets on the right. Then i opened the working bios rom in a hex editor and pasted both data sets at the given offsets. Saved. Flashed. Voila! Everything SEEMS to be working, it shows the correct product name, serial number and an existing windows license.

One weird behavior is still left. The notebook turns on automatically with power, even though the bios has no "ac recovery" option. At least it works.