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coreboot-kgpe-d16/Documentation/mainboard/lenovo/t4xx_series.md
Patrick Rudolph 15d8405584 Documentation: Add basic flashing tutorial for Lenovo 
* Add basic flashing tutorial
** Describe internal and external flashing
** Describe flash supply diode protection
** Gives general advices on flashing
** Describe how to use flashrom --ifd
*  Describe basic flashing on Lenovo T4xx devices
** Describe how to disassemble and access the flash IC on T4xx
** Describe flash layout on Sandy Bridge and Ivy Bridge series.

Change-Id: Ia833e27f4e7d89ee32be9bed21a0c021839facec
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/27852
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
2018-09-30 03:20:36 +00:00

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Lenovo T4xx series disassembly instructions

A skilled engineer takes around 40 minutes to disassemble, flash and reassemble the whole device.

Steps to access the flash IC:

  • Unplug the main battery
  • Remove the harddisk, CDROM, ExpressCard, SIM-card, SDcard, SmartCard, ...
  • Open the bottom flap and remove the keyboard screw
  • Remove the keyboard
  • Remove the screen
  • Remove the top enclosure
  • Remove the CMOS battery
  • Remove the speakers
  • Remove WWAN and WIFI card
  • Remove the CPU fan
  • Unplug the power cable
  • Remove the bottom enclosure
  • Flip the mainboard and remove the main frame