58 lines
1.6 KiB
Markdown
58 lines
1.6 KiB
Markdown
# Lenovo T420
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## Flashing instructions
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The flash IC is located at the bottom center of the mainboard. Sadly,
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access to the IC is blocked by the magnesum frame, so you need to disassemble
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the entire laptop and remove the mainboard.
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Below is a picture of IC on the mainboard, with the pinouts labeled.
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The chip will either be a Macronix MX25L6404E (shown above) or a Winbond
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W25Q64CVSIG. Do not rely on dots painted in the corner of the chip (such as
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the blue dot pictured) to orient the pins!
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For more details have a look at [T420 / T520 / X220 / T420s / W520 common] and
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the general [flashing tutorial].
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Steps to access the flash IC are described here [T4xx series].
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## Working
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* CPU: Sandy Bridge i5-2520M, i7-2670QM
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* RAM module combinations of 2G+0, 2G+2G, 4G+0
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* mSATA
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* USB
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* Video (Intel integrated)
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* Sound (integrated speakers, integrated mic, external headphones, external mic)
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* LAN
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* Mini-PCIe slots (WLAN)
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* Bluetooth
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* Linux
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* Windows 10 (through SeaBIOS as payload, using a VGA BIOS)
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* DVD-ROM drive
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* SD card slot
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* TrackPoint
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* Touchpad
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* Webcam
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* Fn hotkeys (backlight control, thinklight)
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* Thinklight
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* Mute button (Speaker only)
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* Mini Jack audio (headphones)
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* Suspend (Linux)
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## Not tested
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* DSub (VGA) out
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* DisplayPort out
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* eSATA
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* ExpressCard
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* WWAN
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## Not working/TODOs
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* Mutemic button doesn't mute
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* Suspend (Windows 10)
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[T4xx series]: t4xx_series.md
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[flashing tutorial]: ../../flash_tutorial/ext_power.md
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[T420 / T520 / X220 / T420s / W520 common]: Sandy_Bridge_series.md
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