1 # Lenovo T4xx series disassembly instructions
3 A skilled engineer takes around 40 minutes to disassemble, flash and reassemble
6 Read their [Hardware Maintenance Manual](thinkpad_hmm.md) for detailed steps.
8 ## Steps to access the flash IC
10 * Unplug the main battery
11 * Remove the harddisk, CDROM, ExpressCard, SIM-card, SDcard, SmartCard, ...
12 * Open the bottom flap and remove the keyboard screw
15 * Remove the top enclosure
16 * Remove the CMOS battery
18 * Remove WWAN and WIFI card
20 * Unplug the power cable
21 * Remove the bottom enclosure
22 * Flip the mainboard and remove the main frame
25 The following docking stations are supported by coreboot:
27 * VGA, Ethernet, Modem, PS2, 4 USB Ports
28 * Dock ID on pc87382 reads as: 2
30 * Serial, LPT, LEDs, Audio, DVI, VGA, Ethernet, Modem, PS2, 4 USB Ports
31 * Dock ID on pc87382 reads as: 1
32 * PNP IO address of SuperIO pc87384: 0x2e
34 There's no hotplug support for LPT and Serial on Type 2504.
36 The Dock ID reads as 7 if no dock is connected.