(Case 00338710)
Hi David,
As advised, disable the touch to confirm that the touch layer of the board is spiking.
We will then have to go through more in-depth troubleshooting with you.
I would recommend contacting Promethean Technical Support either directly via phone: http://goo.gl/tzNWci or use contact form: http://goo.gl/pqrGC2 and mention the case number.