Hi All! I usually never post, but registered just for that. I encountered dreaded disappearing touch/pen in my TM2 after taken it out/carrying it into backpack for a day. Windows was reporting 'Error 49' and showing 'Unknown USB device'. I am software professional so was sure it is hardware related. Also my TM2 is out of warranty so I decided to just open it up and see what is inside. So don't be fulled by numerous posts here about this being software problem - it is quite simple. Basically there is stupid No-Lock usb connection inside screen which can very easily get loose! Just open it up and re-attach [or better glue it]. This is my TM2 opened up and powered: How to open instructions can be found of HP site here: http://h10032.www1.hp.com/ctg/Manual/c02262878.pdf Follow topic named 'Removing Screen Assembly' Some tips: you don't have to remove HDD. You dont have to remove WLAN antenna wires, just do not pull hard =) Screen itself has 3 screws at the bottom, two under rubber buttons and one under hinge cover. Rest is clips, easy to put back =) While at this you can route new antenna wires in case you want to add 3G PCI-E card later =))) Hope it helps, Alex.