Accuracy of tm-2 - Please report your experience!ll

Question

I had the screen of my tm-2 2010eg (european market) replaced once already, yet, it's accuracy is still gruesome. At the edges it is completely off and even in the fair center of the screen the cursor derivates by 1 - 2 mm into a random direction.
It's practically impossible to write naturally. If I want to write, I have to carefully write "by cursor". Attempting to write naturally results in unreadable results.
Do you have similar problems?

Answer 1

I have the same trouble you have at the edge, but my cursor function otherwise has been fine, not as you describe.
From my direct experience with Tablet PC's (the ones with active digitizers using a pen) and from observing discussion sites such as this, tabletpcbuzz, tabletpcreview, etc., these machines can unfortunately be temperamental.
In my limited understanding, it seems that the active digitizer screen is very sensitive to EM interference, so much so that problems may occur only when certain circumstances are met, such as the machine becoming too hot, the positioning, what it is positioned near, and various combinations.  This results in the very frustrating situation of sending the machine in, the company not being able to immediately reproduce the problem and then saying nothing is wrong with it, or replacing the screen anyway, which doesn't fix the problem because the problem was not with the screen per se.
This is one of my biggest frustrations with the whole computer marketplace.  Things would be so much easier if you could go to a store and actually look at the performance of several machines and then learn what is standard function and what is "a lemon".  I have been assuming the distortion at the edge is part of the basic engineering of the machine and learned to put up with it, but you are correct that if the penabled digitizer isn't working properly then all you have is an over-priced laptop.
My guess is that they can replace the screen a million times and it will not help the problem unless by accident they modify something else at the same time.  In other models of tablet PCs, fixes (other than replacing the entire machine with one that works) have included physically inserting aluminum foil under the screen and on top of the rest of the hardware, increased shielding over specific components, making sure the fan is working correctly, and perhaps even re-clocking the CPU so it runs at a lower temperature, etc.  Unfortunately, an erratic cursor seems to be a symptom of EM interference which can be generated a myriad of ways rather than the evidence of a specific defect with a specific known fix.
If your machine is off warranty and you have no other options, you may want to look at this post:
http://h30434.www3.hp.com/t5/Notebook-Display-and-Video/tm2t-touch-screen-and-pen-input-completely-d...
and follow the links in it about how to disassemble the screen and consider how you would place extra shielding (aluminum foil).  I would look at other discussions sites too, such as tabletpcbuzz, tabletpcreview, and tabletpcmagazine (and its "sister-cites).  Currently the people at tabletpcmag are who I would go to to request help from other than going to HP under warranty.
If others want to correct me or challenge my thoughts, be my guest.  I'm an expert only at being frustrated by EM on my NEC Versa Litepad first generation tablet...