I have a model 512 manufactured in 2007. It has been tough as nails and never showed a hint of a problem until last time out. When I turned on the red dot it was barely visible when looking at bright colored targets/objects but when looking or aiming at dark objects it was clearly visible. I also notice that the red dot remains strong when I maneuver the rifle so the reticle is in the upper right side but disappears completely if the reticle is on the left side of the viewing glass.

Internet search suggests it may be a hydrogen leak or faulty battery contacts. Eotech is not interested in either repair option as they say my unit is too old to be repaired.

I do see the replacement contacts are available for purchase but I do feel the problem is deeper than that.

Has anyone experienced a similar problem and if so house was it solved? Thanks in advance, Brian.