T4x motherboard problem

[synchromesh]

I bought a T41 for my uncle a few months ago. The motherboard would freeze constantly so I realized that it has a GPU problem and bought another mobo from a forum member. It worked for a month or two but no exhibits a similar problem although the symptoms are a little different. What happens now is that the cursor completely disappears in Windows and the machine freezes completely. This happens about 1 per day so far. With the old motherboard same thing happened but cursor would stay on screen instead.

So my question is, could this be anything else but the motherboard? I figure if RAM was faulty, I'd get blue screens so it's probably not that. I changed CPUs several time on old mobo but used the same one with new one so maybe it's the processor? Any other suggestions?

[sktn77a]

Well, this could be something different. Do you have any known good memory you could substitute for your own RAM (you'll need to remove both RAM sticks - one on the bottom and one underneath the keyboard). Then you might try a fresh software install. Could be the GPU but it sounds a little different (as did the original).