I haven't experienced this issue, but since there's a BIOS update addressing it...
Lenovo Support & downloads - BIOS update utility - ThinkPad R400, T400
Version 3.19
BIOS: 3.19 / ECP: 1.06
* (Fix) Fixed an issue where the LCD screen might be wavy (The discrete graphic models only).
* (Fix) Fixed an issue where the computer might not boot when McAfee Endpoint Encryption was installed.
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Update: do not install this update. It made random pixels all over the screen lighter than others. I've gone back to 3.18.
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Maybe it's screen dependent. I've got a led backlit LG.
New BIOS update for T400's with Switchable Graphics
Discussion in 'Lenovo' started by vinuneuro, Sep 6, 2010.