TEMPEST SELF TEST ERROR CODES RAM Failure: The game will produce a series of tones. You will hear a short low tone for each good RAM chip followed by a longer high tone for a failing RAM chip. You may have to connect /WDDIS test point to ground if you have a fatal RAM error. Long High Tone Bad Ram Location 1st R2 2nd P2 3rd R4 4th P4 5th M3 6th M4 7th L3 8th L4 9th K3 10th K4 11th J3 12th J4 ROM Failure: Indicated by a vertical pair of numbers in the top/right side of the screen. Displayed Bad ROM Location B R1 A P1 9 M/N1 8 L/M1 7 K1 6 J1 5 H1 4 F1 3 E1 2 D1 1 R3 0 N/P3** ** If this ROM is bad you will hear a continuous low tone and have no display Other Failures: E EAROM C3 (Aux PCB) P Audio 1 B/C2 (Aux PCB) Q Audio 2 C/D2 (Aux PCB) R RAM See RAM test above M Math Box