Namco 246 (Tekken4) Test Mode Problem

Sirsalt

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I'm assuming this is a bad dip issue, but not being 100% familiar with 246 harware I figured I'd ask before doing any pcb work.

I have a working 246 running Tekken 4. It came running in free play mode with attract volume off and attract video on.

I wanted to adjust the settings, but when I change dip 1 to test mode, it boots normal to game mode.

Is there any other reason test mode wouldn't kick in other than a bad dip bank?
 
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