I recently acquired a T430, it works well for my needs but I have one problem with it :
The screen only works correctly on maximum brightness,
One press on Fn-F8, it strongly dims and starts flickering like mad. unusable.
Further presses on Fn-F8 reduce brightness but still flicker very fast.
It is not an operating system issue as it also happens on the BIOS screen, on windows and on Linux.
Any ideas where it comes from ?
If the display panel doesn't show any signs of an aging backlight (strong pink/red tint on boot-up), it could be the inverter that is at fault. If I were you, I would replace the inverter and see how it goes from there.
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T430 has LED-backlight, which is supported by the LED-board (see HMM pages 108/109).
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