Questions for the OP, apologies if already answered... Before returning, did you experience the same issue after trying: 1) using external peripherals and were they Bluetooth or USB, 2) changing the screen refresh rate, 3) sitting in close proximity but not touching the laptop or looking at the screen, and finally 4) touching the the laptop as if operating but while NOT looking at the screen? Trying to rule out the following, roughly in order: reaction to airborne fumes, reaction to screen, reaction to surface current fields or hand capacitance/induction, and finally reaction to skin chemical contact.