Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message

T61 internal monitor blank, external monitor OK

T60/T61 series specific matters only
Post Reply
Posts: 12
Joined: Sun Jun 01, 2014 9:45 pm
Location: Bangkok, Thailand

T61 internal monitor blank, external monitor OK

#1 Post by excelsior » Thu May 17, 2018 9:36 am

I have a great T61 (8892-02U) with upgraded T9300 and 4GB RAM that I bought from RealBlackStuff two years ago. I love this machine and don't want to retire it. Please help me solve this problem:

The internal monitor is blank (but backlight is ON) throughout the Windows 7 boot up process - nothing displays on the screen. (no colors, no text, no cursor)
The external monitor on the VGA port works normally. I'm typing this post on an external monitor.

This T61 has the NVidia NVS140M, however, it does not show any symptoms of a graphics chip failure reported by others (beep, colors on screen, BSOD, etc.)
The problem first happened as an intermittent blank screen for about 5-10 seconds while in the middle of normal use. Then a week later when booting the screen was blank. Opening and closing the laptop lid/screen caused a flicker of the windows login screen, and then it immediately went blank again. As of today, however, opening and closing the lid does not cause the flash of the windows login screen anymore. It is completely blank.

I have tried the following things, without success:
1. Booting to safe mode.
2. Reinstalling the latest NVidia drivers from the NVidia website.
3. Reseating the ribbon cable, both on the motherboard side, and on the back of the LCD panel.
4. Allowing the computer to get up to normal operating temperature, then restarting.
5. The ribbon cable does not seem to have any visible damage.

-Has anyone with the discrete graphics chip NVS140M on the T61 seen this issue and confirmed it is the chip?
-If the ribbon cable was bad, would the symptoms above match?
-What else can I try?

Thank you.

P.S. By the way, I highly recommend RealBlackStuff you won't be disappointed.
IBM T61 (8892-02U): T9300 2.50 GHz, Windows 7 pro 32-bit, NVS 140M, 4 GB RAM, 120gb Intel SSD, 1TB WD HDD in Ultrabay

Posts: 18813
Joined: Mon Sep 18, 2006 5:17 am
Location: Mt. Cobb, PA

Re: T61 internal monitor blank, external monitor OK

#2 Post by RealBlackStuff » Thu May 17, 2018 10:31 am

Hi Mike,
if I remember correctly, that was an 08/04 (2008/April) laptop.
This means it still has the old version nVidia chip.
Most likely it is finally giving up the ghost after 10 years of faithful duty.
The external monitor might still work for a while longer, the internal one I'm afraid is a 'goner'.
That's not a cable problem.

You can read all about it here: https://www.theboardroom.info/t61motherboard.html
On the first picture there you will see 1021A under nvidia on the GPU.
That's the YY/WW = Year/Week = 2010/week 21 production date of the GPU.
Yours is probably something like 0810A
Our Forum member TuuS still has some NOS T61 nVidia motherboards.
Lovely day for a Guinness! (The Real Black Stuff)

Check out The Boardroom for Parts, Mods and Other Services.

Post Reply
  • Similar Topics
    Last post

Return to “ThinkPad T6x Series”

Who is online

Users browsing this forum: No registered users and 23 guests