I've have just successfully read the bios from my T440s and wanted to share info:
I purchased this from ebay:
https://www.ebay.co.uk/itm/273673803002?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=C1P_QAXrTEO&sssrc=2047675&ssuid=_WX6HXDFQ32&widget_ver=artemis&media=COPY
I used this software:
https://forum.laboneinside.com/viewtopic.php?f=35&t=76
The main problem I had was getting a connection with the clip, after a few attempts I realised the clip was not quite on the chip properly. One it was connected the 'Detect' function worked fine in the software:
The chip in the Lenovo 440s is a Winbond W25Q64FV as in the picture. I hope this info is helpful to someone.
