Benq has a policy of 5 dead pixels warranty. How to count the pixels. Also if this is a dead pixel. Tried the rapid flashing technique with various programs. They dont work
I would advise you contacting BenQ if you still have warranty and invoice of the purchase.
zowie.benq.com/en/support/contact.html ---> and click RMA (return authorization)
Dead pixels or stuck pixels? Dead pixels can't be fixed by flashing or rubbing the pixel, but stuck pixels can. A dead pixel is black aka not working while a stuck pixel is stuck on a color. http://www.jscreenfix.com/ try using this to see if it's a stuck or a dead pixel and go from there.