Last night i worked some more on Tempest and got it in test mode. The only letter showing is 'm' for math board. I have a spare math board so i moved all of the chips over from the orig math board to the new one, with the exception of ram chips 126 and 131, bc those chips were already present on math board 2. I put math board 2 in and my graphics issues did not change, stayed exactly the same. Should i go through switching out the ram chips one at a time since i have 2 extras? a new big blue is on the way as well.

