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Filippo Ferrari 2024-01-24 21:12:57 +01:00
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content/posts/my-t400-libreboot-guide.md
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@ -40,3 +40,5 @@ The first step is to flash libreboot on your T400, the libreboot docs have a ton
## Clip -> chip connection ## Clip -> chip connection
After having disassembled the device, you will have access, just on top of the two RAM slots, to the bios chip. Using the jumper cables connect your programmer of choice to the Clip and then the clip to the chip. REMEMBER to turn on the programmer only AFTER a solid connection between the clip and chip is established, to avoid any kind of voltage issue. Similarly, turn off the programmer BEFORE removing the clip. After having disassembled the device, you will have access, just on top of the two RAM slots, to the bios chip. Using the jumper cables connect your programmer of choice to the Clip and then the clip to the chip. REMEMBER to turn on the programmer only AFTER a solid connection between the clip and chip is established, to avoid any kind of voltage issue. Similarly, turn off the programmer BEFORE removing the clip.
the next step is to read and save the current BIOS, so that, in case anything goes wrong while writing onto the chip, you will have a backup to use to go back to a working BIOS. It is highly recommended to backup the .bin a couple of times and use the command "diff" to check the you have two exact copies of the BIOS, keep trying untill you do. This is the safest option, i never do it cause it bothers me trying to have a working BIOS.