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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
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