My NBAFB shot clock is not counting down. When the game is turned on it shows either 80 or 00 and doesn't work at all. A few weeks ago I noticed the shot clock counting down oddly and showing random numbers. Now it just stays where ever it's at when it's turned on.

I ran the mechanical test (T16) that checks the motor and blocker guy and in the test it states the clock will count down from 24 to 0. The clock doesn't count down during the test, but the test doesn't give an error. There's no credit dots or errors that I can find. The machine plays fine and everything else works as normal.

Any thoughts?

Thanks.

~Cody

Took all the connectors apart and reconnected them. Reset factory settings too. Neither has had any effects on the shot clock working.

When the machine is turned on it shows 80 or 00.

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When I unplug this wire and plug it back in (while the machine is on) it will go to either 24 or 20, but still not function.

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Those are the only 4 numbers it will show. 80 or 00 when turned on and 20 or 24 if I unplug that wire (while it's on). Once it's turned back off it goes back to 80 or 00.

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It seems like it's a software or program issue. Is there a way to do some sort of hard reset or update the software?

Anyone have any guesses on what might be causing this issue?

Fantastic! You really know your stuff!!!!! Any idea why it shows 80 and 00 when it turns on? It totally makes sense now that when I unplug it and plug it back in it goes to 24.

What's you guess on what's broke? Do you think this is the solution?
http://www.marcospecialties.com/pinball-parts/A-21399

So the Defender Mech is broken, at least that's my newest error reading. The blocker (defender) doesn't move and when the game starts up it gives the error dot and when I test it the message is "Defender mech is broken".

And the shot clock is even more messed up now working less and doing odd things. Would it be safe to assume this is all connected or am I chasing 2 problems now?

Any thoughts on how to test the mech? Should I call someone to help? Anyone know of a good repair guy in Portland, OR?

It's fixed! Wanted to update this thread in case anyone else does a search in the future and has the same issues I had.

After doing all the tests I felt comfortable doing and looking in to the suggestion made I did a search on here to find a good local pinball repair guy. Curt at Portland Pinball Repair came recommend from a couple people so I gave him a call. He came out to my place and took a look at my machine. After testing the easy stuff he needed to take it back to his shop where he would have access to more schematics and spare testing parts. He had the machine a little over 2 weeks and gave me several updates on the parts he was ordering and what exactly was being done. In the end it turned out to be an inexpensive IC chip and the game is back up and running great so far! Curt even changed out a couple plastic pop bumpers that were showing their age. He did it all with a great attitude and in a reasonable time frame. On top of the great service the price was reasonable too. Super nice guy that really knows a lot about pinball machines!

Thank you to everyone that made suggestions and really appreciate the great site!

~Cody