Lenovo ThinkPad T420 (English) User Guide - Page 34
Features, in Windows XP - brightness control
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The Certificate of Authenticity of your computer is shown as below: Features Processor • To see the system properties of your computer, click Start, right-click Computer (in Windows XP, My Computer); then from the pull down menu select Properties. Memory • Double data rate 3 (DDR3) synchronous dynamic random access memory Storage device • 2.5-inch (7 mm height) solid state drive or 2.5-inch (7 mm or 9.5 mm height) hard disk drive • mSATA solid state drive (on some models) Display The color display uses TFT technology: • Size: 14.0 inch (355.6 mm) • Resolution: - LCD: Up to 1600-by-900, depending on the model - External analog monitor: Up to 2048-by-1536, depending on the model - External digital monitor: Up to 2536-by-1600, depending on the model • Brightness control • ThinkLight • Integrated camera (on some models) • Built-in microphones (on some models) Keyboard • 89-key, 90-key, or 94-key • UltraNav (TrackPoint and multi-touch touch pad) • Fn key function • ThinkVantage button • Volume control buttons 16 User Guide