11-03-2008 01:24 PM
C2D 7300 2.0G
System: windows XP Pro
Graphic card: NVIDIA Quadro NVS 140M
The problem start around two weeks ago.
When the problem comes, the whole screen is filled with vertical lines and at that time, I can do nothing except shut down my computer by pushing the power button. However, when I try to start my computer just after I shut it down. It won't start. The screen become black, sometimes with some vertical lines on screen. I can not even see the lenovo logo.
I usually have to do the "shut down- start" several times to occasioanlly get one chance to enter the system.
Initially, I thought it might be some virus problem. But I tried with different software like Mirotrend, Kaspersky, Norton. And that shows my system is clean. So I think it should be some hardware problem.
Since I saw some defect about the graphic card "NVIDIA Quadro NVS 140M",is it really caused by this?
11-04-2008 01:18 PM
11-05-2008 09:51 AM
I actually opened the laptop screen yesterday. And it looks like all the connections are good. I'm not very sure which connection you're talking about.
I examined the wire which is just behind the LCD screen, and it is good.
Finally, I did nothing except cleaning away the extra dust inside the machine, especially near/inside the fan.
11-05-2008 02:33 PM
I'm sorry to say that it sounds like a GPU problem to me...
Have you tested the machine with an external monitor?
11-06-2008 11:02 AM - edited 11-06-2008 12:48 PM
I have not tested using external monitor.
The problem is a bit complicate:
There are actually 4 phenomenons:
Sometimes, it can even enter the system while the screen is alwasys black since start. I have the fingerprint reader installed, and after I turn on or reboot my laptop for a while, I just swipe my fingerprint to allow enter into the windows system. And at this time, I can see nothing on the screen. But after I swiped my finger, I can hear the sound of entering the system. But I can see nothing on screen from the beginning to end.
This happens much more frequently. After I turn on the laptop, the screen shows some vertical lines, and that's it. I can not see the "Thinkpad" logo. The brightness of the vertical lines may change sometime, but nothing else showed up.
This just starts recently. After I turn on the laptop, I can see "Thinkpad" logo. But there're some black dots on the white letters "Thinkpad". And then when the screen shows the boot picture of windows xp, the screen also shows some weird color change in the XP logo. And before the system let me input the password, it starts to reboot. However, after reboot, the problem is still there.
There's still a small chance that I can enter the system. Usually I have to turn off - turn on around 10 times or even more to get a chance to enter the system without problem.
Based on the experience 1 & 4, I think the parts of my computer (either Graphic card or motherboard) shoud be fine, or at least should work sometimes. Maybe it is not stable. But what I really think is the connection somewhere is kind of loose, and I just did not find it.
11-07-2008 07:47 PM
That sounds like GPU that has gone south...I'm sorry to say. You'll be looking for a new motherboard if you're intent on keeping the machine...