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Generally the game goes into test mode when the test switch is enabled.
The test switch is "not" on the game board itself.
The test switch usually is a test switch button towards the front of the game towards the coin door.
Do you have a test switch installed on the game?
Guess I should have specified the cab does have a test switch Ns says a diff msg when I flip it. This is def not indicating the test switch.
Ok looks like the problem might be slightly larger. None of the dipswitches seem to work. No matter what I flip the switches to on the first or second bank of switches, the dipswitch test shows no change. Anyone know what might cause both sets of dipswitches to stop working?
I looked up the schematics on that board, there's 1 line that 'enables' the chips that read the dipswitches. Since both banks of dipswitches are bad, you can assume (HAHA) that the dipswitches both didn't die, and the two chips that read them both didn't die, but there's an issue with either the chip that creates that 'dipswitch enable' line, or that line is actually cut.
It may be something else but that would be what I suspect, like dude above said it could easily be a scratch on the back of the board.
Bingo! Pins 19 on UH3 and UJ3 are supposed to go to UH24 pin 19, but that link was broken. I connected a jumper wire and now it reads the dips normally. Problem solved!
But now I'm still having the same issues as my other NBA Jam with random sound samples played at the wrong time. Two main boards (TE and non-TE), two sound boards, two ribbon cables and the same weird sound issues. I checked the voltages and I'm getting about 5.1V on the chips. I've also gone as low as 4.8 and nothing makes the problem go away. Bad power supply perhaps?
Thanks again helping me solve the original problem.