Is anyone using a DVI extension cable w/ their 2010 MP? If so what brand and how long is it? (I have the stock 5780). Curious b/c I bought a 10ft cable from Monoprice that prevents my 2.8 QC from booting. The power supply just makes a clicking sound. When I remove the cable my machine boots normal. Also if I plug the DVI extension cable in after I boot all is fine. The problem is booting. Anyone ever seen anything like this before? Also no problem booting my 24" ACD w/ mini displayport extension cable. The DVD extension cable is dual-link - not sure if that is a factor or not, though the 23" ACD is single-link.