Re: TP-755CX screen dims using battery

New Message Reply Date view Thread view Subject view Author view Attachment view

From: Randy Whittle (whittle_at_chaph.usc.edu)
Date: Fri Aug 11 1995 - 22:53:04 EDT


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.

----- ____________________________
Randy Whittle whittle_at_usc.edu | WWW Hope Page: |
USC Graduate School of Business (Fight on 'SC!)| http:// |
 "Did you really think you could call up the | www-scf.usc.edu/~whittle/|
     Devil and ask him to behave?" ----------------------------
       -Fox Mulder on T.V.'s "X-Files" speaking to an occult practitioner


New Message Reply Date view Thread view Subject view Author view Attachment view

This archive was generated by hypermail 2.1.3 : Thu Jan 23 2003 - 09:52:43 EST