T400 screen brightness frequently resets

My T400 screen brightness resets to its lowest value intermittently. Sometimes it takes only 30 seconds, sometimes it's several minutes. If I press a key, it goes back to the bright setting. I didn't intentionally change any power or screen settings, and none of the settings I can find (Windows or ThinkVantage power settings) indicate that this should happen.
Any idea what's going on?
Thanks.
Message Edited by allanbracker on 08-11-2009 10:44 AM

@Jeffw3030,
try this.
http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T410-Screen-flickering-randomly-screen-cont...
//JameZ
Check out the Community Knowledge Base for hints and tips.
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Products Affected
Desktop Computers, Portable Computers
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Hi Clarinet187,
Welcome to Lenovo Community Forums!
As per the query you are facing issue with screen brightness for your ThinkPad T500.
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Please click here to get the complete steps on the issue.
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T400 screen brightness frequently resets

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