Will remove spyware (networking and remote access) but leaves part of the blob.
Note, libreboot has been forked because the original people started using proprietary hardware. https://www.youtube.com/watch?v=Sg3bPvBF3bs&t=13s
Hardware
A CH341A Programmer or Raspberry Pi Pico ($4 - $6 USD): To physically connect to the BIOS chip.
SOIC-8 Clip ($12 - $18 USD): To attach to the chip without soldering (though some prefer soldering for stability).
A Second Machine: To run the flashing software (your X230 is perfect for this).
Video: https://www.youtube.com/watch?v=iGKhsjvlSBQ&t=2s Got to 10:00 for connecting the clip.
Process:
Disconnect battery and stuff, put clip (which is wired to Pico) to little Thunderbolt chip, then connect the USB cable to the 2nd computer so you can start flashing.



Electronics District on Calle de República de El Salvador, 10:00 AM to 6:30 PM.
Specific hubs where the "serious" parts are kept:
SGE México (Aldaco 16-C): Just half a block off El Salvador. They are specialists in repair components and almost always have SOIC-8 clips and CH341A programmers in stock. Price: Around MX$95 – MX$175 (~$5.30 – $9.80 USD) for the clip itself. Can also probably buy a Pi Pico here.
LionChip México: A very reliable shop for hobbyist electronics and programmers. They often sell the "Kit" which includes the clip, the breakout board, and the ribbon cable. They also might have the Pi Pico.
Plaza del Salvador(The "Electronics Plaza"): If the individual shops are busy, enter this multi-story plaza. Walk past the consumer speakers and LED strips to the smaller stalls on the second or third floors—these are the ones that sell specialized IC test clips and EEPROM tools.
"Busco una pinza de prueba SOIC8 (o SOP8) para programar BIOS/EEPROM."
If you are trying to flash a BIOS or internal chip, make sure you get the kit that includes the adapter board (the tiny green PCB that converts the clip's ribbon cable to standard pins).
Check the Voltage: Most SOIC-8 clips on El Salvador are intended for 3.3V or 5V. If you are working with a modern low-voltage chip (1.8V), ask if they have the "Adaptador de 1.8V" as well, or you risk frying the chip.
Quality Check: Before you leave the shop, open the bag and check that the gold pins inside the jaws of the clip are straight. These clips are notoriously fragile, and a single bent pin will make it impossible to get a "read" on your chip.
If you can't get the Pico at SGE Mexico,
*"Pico para Python."
*
AG Electrónica (República de El Salvador 20): This is the "big" reliable professional shop. They have a massive inventory system.Price: Around MX$90 – MX$120 (~$5.00 – $6.70 USD) for the standard Pico.