Definatly check your cabeling, i purchased a cable from kvant and the interlock pins were not shorted ( as they do this internally on thier projectors i believe) this caused me some problem initally as i have crap rgb from china an had a similar issue to what you mention.
Som projectors will not work if the correct pins are not shorted as per the ILDA spec.
quietlee wrote: Please can you give me the pinout of what pins should be shorted out to make this dot thing goaway as I have the same problem.
this is a snip of a reply email from Dusan when i had this proble a year or so back
About ILDA cable, all our cables are tested so I thing that problem was other.
I thing that with pin 7 and 14 because in standard it is for Interlock but our lasers don't need it so this pins are conected directly together in our laser.
Our interlock is provided another. If the signal not going to laser than laser are not running so we don't need pin 7 and 14.
Please in attachment you will find description of our conection and standard conection like is recomended by Pangolin.
So please checkit.
So if ther was another problem Let me exactly where was problem according you.
Thanks a lot,
<< END SNIP
You may find that this will this will fix the problem as i found the cable supplied by Fiesta did not have these pins wired at all, which is fine if used on thier projectors but cab be problematic when used on other units.