I've been working on this issue for a while now and have come up short. The DMD on my NBA fastbreak does not display anything when the game is booted up. Everything else works correctly and the game is able to be played with the exception of nothing is displayed on the DMD. Here is what I have already done:
1) Rebuild the HV section of the board - this had no effect on my game, but when installed in a friends NBA fastbreak, it worked correctly.
2) installed new ribbon cables - again, had no effect on the functionality of the display
3) tested the DMD from my NBA Fastbreak in my Johnny Mnemonic - The DMD worked in Johnny
4) tested the DMD from my Johnny in my NBA Fastbreak - still nothing
5) tested voltages going to the DMD reading as follows
Pin 1: -118.3
Pin 2: -106.7 (-95.9 with DMD disconnected)
Pin 6: 5.1
Pin 7: 11.3
Pin 8: 67.3
If anyone has suggestions to what I should be trying next, please let me know. This problem has me pretty stumped. Also, if any additional photos would be helpful, I can provide them.
Thanks!
LRN