Re: TP-755CX screen dims using battery

[whittle@chaph.usc.edu (Randy Whittle)]

At 3:17 PM 8/11/95, Joseph Manning wrote:

>   The screen on my new SVGA TP-755CX dims considerably
>   whenever I remove the AC power cord and it switches to
>   battery power.  This happens even when the Li-ion battery
>   shows a 100% charge, and the computer is configured for
>   "High Performance" under battery power.
>
>   My questions:
>
>     - is this normal, or do I perhaps have a weak battery?

        It's a "feature" to save your battery.

>     - if it is normal, then is there any way to circumvent
>       this dimming, even if it shortens battery life?

        On my 750C, it can be circumvented at the DOS line by typing "PS2
BR N".  PS2 is the command for invoking ThinkPad features (as you know), BR
stands for "Brightness", and "N" is "Normal" (rather than "battery save".
On the 750's it was undocumented--I don't know whether it is known (or even
*works*) on the newer ones.

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