Bios Mods -The Best BIOS Update and Modification Source

Full Version: T450 brightness control
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Hello,
I need a modified Bios for my Lenovo ThinkPad T450. I've changed the Display and now the brightness controll is lost. The Display is an: DISPLAY\LGD046D\4&16248605&2&UID265988. My current Bios is 1.27.
I hope someone can help me. Sorry for my bad English.
Thank you very much.