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need backup I/O
There are two BIOS chips on this board
Download list
this is front side bios file u need a second chip bios or o/s ?
I/O MEC, ENE, ITE
You are a technician but don't know where is I/O ( EC ?
sorry for that but
For Lenovo ThinkPad X1 Nano Gen 1 (S/N: R910W8WV), this is expected behavior.
On this model, there is no standalone I/O / EC chip (such as ITE, ENE, or Nuvoton) that you can identify and program separately.
So if you:
you have already preserved:
For Lenovo ThinkPad X1 Nano Gen 1 (S/N: R910W8WV), this is expected behavior.
Why you cannot find a separate I/O (EC) chip
On this model, there is no standalone I/O / EC chip (such as ITE, ENE, or Nuvoton) that you can identify and program separately.
Technical reasons
- The Embedded Controller (EC) functions are integrated into the platform design.
- I/O control (keyboard, power sequencing, sensors, etc.) is handled through:
- The Intel platform controller architecture, and
- Firmware stored in the BIOS SPI flash.
- Lenovo designed the X1 Nano Gen 1 as an ultra-thin platform, reducing discrete controllers.
What this means in practice
No visible square QFP EC chip near the keyboard connector- No separate I/O EEPROM to back up or reflash
All I/O-related firmware and configuration are stored in the BIOS SPI chip
Correct takeaway for repair work
So if you:
- Locate the 8-pin BIOS SPI flash, and
- Back it up with a programmer (SVOD / CH341A / RT809H),
you have already preserved:
- I/O configuration
- Power sequencing data
- System identifiers (SN / UUID / MAC)
