Please be specific as to what you mean.
Can you burn a copy of knoppix or ubuntu from another computer or are you saying that you have already tried knoppix?
Unless you are able to perform all of the tests I am suggesting then we can't determine what is the problem and otherwise I don't know how I can help you because you aren't giving me anything to work with. You could branch out and either replace the monitor or reinstall the OS but it is possible that neither are the problem.
There is absolutely no way for you to borrow a monitor or camera? I don't know what to tell you.I can't yet say this for sure but if you had the same thing happen on another computer as you stated here then it sounds to me that its the monitor but again without you performing all of the tests we can't be certain. I'm not even understanding what the problem is because I can't visualize it.





I can't yet say this for sure but if you had the same thing happen on another computer as you stated