Already done this, I've unsoldered then soldered it on a CH341a to read the data, i saved the original bin file, only once though. I then erased the chip thinking I had the replacement file, I know a noob thing to do. Also I didn't realise the file should be a few mb. This was before I came here, I was hoping originally to write the update file from the Lenovo website to the chip via the Ch341a, thinking just write a bin file but none contained in the download. The file I sent earlier is the dump from the chip...

Sorry, my bad. S/N PF1C63G4,
Lenovo yoga C740-14IML
Model name 81TC
Mo:PF9XB0106205

Hope this helps, thanks in advance...

Hey, well I've started to learn about electronics in all aspects including computer and laptop repairs. I hope to learn from this great community 😃

Hi there, please could someone have a look at my bios bin file. I believe the bios to be corrupted as my Lenovo yoga c740-14iml will not turn on at all with the battery charged and all other possible issues checked. Board is FYG41 NM-C431 REV 1.0. Just a slow pulse of power led, pressing the power button does Nothing. If the corrupt file cannot be used in anyway, could someone send me a clean original bios bin file adapted to use. This would be much appreciated...