What was the question? I'm assuming you're inquiring about an eye malfunction...does the marker fire? Try to give a clear and detailed description of your problem. I'm not trying to be smart...I just read and reread several times and "possible eye malfunction" was the only thing I could infer.
Just reread it again...by card do you mean board? Does the marker fire? If it fires then the board will do this...when you turn it on it will show display on the oled screen...the backlight will go out after a certain amounts amount of time so your display will dim...if you poke a button on the rear of the grip frame it will light up again (or should)...this is normal. Also with the eyes usually they are solid for a few seconds then the dim a bit and flash rapidly after the gun sits idle without shooting. This is also normal...if there is another problem please provide another clear and detailed description.