Black screen and crash down of T61 due to "Nvidia bug"!

My T61 type is 8891CTO, T7300 2.0GHz, 2G Ram, Windows XP, Nvidia 140M Video Card.
Recently,  it displays black screen after the windows logo when I start my computer. Even after restoring to the factory state, it blanks off when restarting the system. I restarted the system several times and could hear the sound of hard drive, but I could not see anything on the screen. And now, it can not boot upand I even can not go into the BIOS setting.I don't know why. Please help me out. This problem drives me crazy. Thanks a lot!
And where could I find the repair station of Lenovo near Ann Arbor, MI, 48105? 
Message Edited by happiestboy on 01-11-2009 12:45 AM
Message Edited by happiestboy on 01-11-2009 01:51 AM
Message Edited by happiestboy on 01-11-2009 01:54 AM
Message Edited by happiestboy on 01-11-2009 07:37 PM
Current: T500 2081CTO; T61 8891CTO

sktn77a wrote:
I think it's a little more complicated than this.  The T61p issue with the 570M video chipset has been well documented and appears to be related to a power issue on the T61p motherboard (although they may not be present in every T61p).  I don't believe this issue exists with the 140 video chipset in the T61 (but others can correct me if I'm wrong).  The mysterious Nvidia "problem" that was identified and widely published earlier this year has been kept a pretty close secret (I don't know if this is the cause of the T61p problem). In your case, it sounds like you just need to send it in under warranty.
sktn77a wrote:
happiestboy wrote:
After searching online, it seems to be due to the Nvidia video card design bug. All the laptops have the video card whose chip is G84 or G86 has the potential to crash and never boot up especially for T61 and T61p series with diecrete video card. Now I was wondering how to deal with it and how Lenovo's technical support help me out.
Thanks. 
I think it's a little more complicated than this.  The T61p issue with the 570M video chipset has been well documented and appears to be related to a power issue on the T61p motherboard (although they may not be present in every T61p).  I don't believe this issue exists with the 140 video chipset in the T61 (but others can correct me if I'm wrong).  The mysterious Nvidia "problem" that was identified and widely published earlier this year has been kept a pretty close secret (I don't know if this is the cause of the T61p problem).
In your case, it sounds like you just need to send it in under warranty.
In fact, Nvidia has confessed the bug of Nvidia G86 and G84 series, and said to reimburse the computer manufacturers such as Dell, HP, Lenovo, Sony, etc for customer extened warranty, return, repair due to the Nvidia Video Card.
Here is the Form 10-Q and Form 8-K for Nvidia CORP.
http://au.us.biz.yahoo.com/e/081202/nvda10-q.html
http://au.us.biz.yahoo.com/e/081110/nvda8-k.html
Current: T500 2081CTO; T61 8891CTO

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