this post was submitted on 23 Aug 2025
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This the photo from the back cover.
I looked up the TP00061B and selected 3rd gen, I found this: https://download.lenovo.com/pccbbs/mobiles_pdf/x1_carbon3_hmm_en_sp40g55065_01.pdf
Looks like there's a coin cell battery in there, so you can remove it to reset the CMOS. I'm not sure how relevant this video is to your exact model, but I'm sure you can figure it out using this as a base if you're comfortable working on computers generally: https://www.youtube.com/watch?v=secIrlXFy5k
Edit: Oh, I see you got it! Nice ๐ Happy computing!