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coreboot-kgpe-d16/Documentation/mainboard/lenovo/t4xx_series.md

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Lenovo T4xx series disassembly instructions

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

Read their Hardware Maintenance Manual for detailed steps.

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

Docking stations

The following docking stations are supported by coreboot:

  • Type 2505
    • VGA, Ethernet, Modem, PS2, 4 USB Ports
    • Dock ID on pc87382 reads as: 2
  • Type 2504
    • Serial, LPT, LEDs, Audio, DVI, VGA, Ethernet, Modem, PS2, 4 USB Ports
    • Dock ID on pc87382 reads as: 1
    • PNP IO address of SuperIO pc87384: 0x2e

There's no hotplug support for LPT and Serial on Type 2504.

The Dock ID reads as 7 if no dock is connected.