Sounds like your i1D2 puck may have just gone bad. They do that, and the final calibration looks green when they do.
Hi Scott...wondering, if this is the case, what you might suggest as a replacement.
Need to see if these old pucks are still sold.
I've got a NEC 2690wuxi. Use an i one display 2 x-rite puck. Spectraview II v.1.1.16.01.