That's the usual reason why ugly, obviously bolted-on filters end up being used in products. More than likely, they designed the product without the filter, went EMC testing, failed, and had to come up with a fix at the last minute. I'd expect it to either work or not work. PSU noise certainly could affect the touchscreen, though it's highly unlikely this would be in a way which gets worse over time. Any additional tests I could do would be welcome I'd love to hear some (even wild) guesses on what could be the problem, in order to have a path to follow. In conclusion, I'm not afraid to open it up and do additional tests or mods in order to fix it, however I have no idea even theoretically, what could be the problem. Some people are suggesting to add some insulation between the touch interface and the screen but there is anecdotal evidence that this doesn't work.

When the problem manifests, shutting down, removing/inserting the battery and rebooting, seems to fix the issue for about an hour or so. Installing/Uninstalling the acer drivers makes no difference 5. The problem is only on the lower edge and the right edge 4. When the problem manifests, a hot reboot, a boot to a different OS (as in linux, not windows) doesn't fix the problem so it doesn't seem a software issue 3. When cold booted, the problem needs 3-4 hours to manifest (at least) 2. Below are the results of my tests on this. The upper screen registers touches when the fingers of the user are not even close to the device, in a rate of about 30-40 touches/sec (roughly) which means that it gets crazy after a while. Since I don't trust this guy, I will not go with this solution. People haven't found any fixes except from a guy who goes around forums asking for 20 euros to give the fix. Many people seems to have the same problem so I almost certain that this is a design issue, however acer seems to quietly deny this issue so the manufacturer is a dead end. I researched the thing in the interwebs as well as I have done my own tests. The problem with it is that the upper screen registers so called 'ghost touches' (more info below).

The laptop is the Acer ICONIA 6120 Dual-Screen which although is a normal laptop, instead of screen/keyboard combo has 2 touch screens and a virtual keyboard. Hello Everyone I was given a laptop to try to service which seems to have a design flaw.

Acer iconia 6120 dc jack