I have the same set, with similar issues. Mine strobes in in some picture settings, and a blue mask with a slight spiked fence on the top edge grows up from the bottom.
From your pics I see it seems to also be related to the blue gun.
It is likely the led driver board (unavailable). You can also try this to isolate:
power off, remove ac cord, remove the 2 screws that hold the light engine chassis in, and the dvi plug on the left so you can slide the assembly out a few inches. On top of the led light assembly is a small circuit board. The connectors from left to right at blue, green, red. These are all different pin count connectors, BUT the connector at the led module end are all the same. Gingerly squeeze the plug at the led module end and remove the plug from the blue and green leds and swap them at the led module end. slide the light engine back in, reconnect the dvi cable. Turn it on and watch your picture. Now obviously the colors will all be off, but the artifacts and smearing color is what you need to look at. If it remains blue, then there is something strange with the blue led. if it changes to green, then it is the led driver board, or possible the dmd board that generates the color signals. If I had a service manual I would check the drives for the 3 colors where it leaves the board as that couls also be the culprit.