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twister
What's DOS?
Posts: 2
Registered: ‎07-16-2009
Location: US
Views: 851
Message 1 of 6

T400s screen blinks when ac cord disconnected - how to fix it?

Just received my T400s a few days ago and very happy with it!!!  But one thing that annoys me is when I unplug ac power chord, screen goes blank and than back on. The same when I plug ac power chord back in.  I posted this question in another forum (NBR) and someone replied that this problem went away after clean install of OS without Thinkpad utils.  So, it has something to do with one of the utils.  BUT, I can't find it anywhere how to disable this behavior.  PLEASE advice!!!
T400s, T60, T42, T23, 600x
lead_org Microsoft MVP Contributor
Microsoft MVP Contributor
Posts: 21,009
Registered: ‎12-19-2008
Location: Australia, Melbourne
Views: 844
Message 2 of 6

Re: T400s screen blinks when ac cord disconnected - how to fix it?

try uninstalling the power manager software and then reinstalling it. 
Regards,

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft
Osedax
Paper Tape
Posts: 4
Registered: ‎01-17-2011
Location: Canada
Views: 457
Message 3 of 6

Re: T400s screen blinks when ac cord disconnected - how to fix it?

I just started having this problem after installing the latest round of updates. I tried uninstalling and reinstalling the power manager, but I am still having the same problem. 

 

Do you have any other suggestions?

nevermore
SCSI Port
Posts: 38
Registered: ‎09-07-2010
Location: Romania
Views: 449
Message 4 of 6

Re: T400s screen blinks when ac cord disconnected - how to fix it?

Have you tried reverting to the previous version of Power Manager? Or restoring your system to a previous state? Just a thought...

Retired Moderator
Retired Moderator
Posts: 3,220
Registered: ‎07-31-2008
Location: Pakistan
Views: 424
Message 5 of 6

Re: T400s screen blinks when ac cord disconnected - how to fix it?

Hi Osedax,


See binaryspiral's suggestion:- http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T400-screen-blinks-when-AC-power-is-connect...

 

With latest updates, did you also install recent BIOS?

 

Keep us posted.

------------------------------------------------------------

Maliha (I don't work for lenovo)
ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]

IdeaPad: U350

Apple:- Macbook Air [Snow Leopard]
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Osedax
Paper Tape
Posts: 4
Registered: ‎01-17-2011
Location: Canada
Views: 414
Message 6 of 6

Re: T400s screen blinks when ac cord disconnected - how to fix it?

Binaryspiral's solution worked for me - thanks. Smiley Very Happy

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