and see if that works. If so, it about rules out the video device. If you're handy with small tools, you may be able to replace the screen yourself if you can find one. Lenovo has service manuals on their web site but they're fairly well buried. What you may need to do is pull the old one out. This gives you practice and an idea of how this thing is assembled. There will be a PN on the back of the screen. You may be able to google that and find the right part. IBM used various screens from more than one manufacturer so referencing the part number is important. There are laptop parts businesses to be found on the web and lots carry IBM stuff. It will be a used but working screen and you may not be able to return it. Expect to pay $150 or more. To have a shop fix it will probably cost at least 4X times that.
I have an IBM ThinkPad T40. One day when I booted it up, the display was all garbled. All is see are lines and stripes of color. I can't see the boot up screen letters or anything useful. I can't tell if the system is trying to tell me there is an error or not, because the display is nothing but alternating colored stripes.
Any suggestions on what the problem might be or how to fix cheaply?