(Topic ID: 208813)

Bought my first Rottendog MPU and it's dead...

By TheDrewster

6 years ago


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#1 6 years ago

I installed a brand new Rottendog MPU004 into my Robocop this evening. After swapping over the CPU and the ROMs, I found that the board does not boot. The +5 and the PIA LED stay lit at all times. I have two other MPU boards that partially work with different issues, so I know the power supply and everything in the game itself is good. Is there something else I am overlooking? Or did I get a dead MPU right out of the box?

#3 6 years ago
Quoted from wisefwumyogwave:

I had this happen when I changed it out on Jurassic Park instruction do not tell you to swap over one of the IC chips i forget which one look carefully at both boards and match up the ic's

I checked, there's nothing left to swap over.

#6 6 years ago
Quoted from Borygard:

This.
Robocop uses two ROMs. Jumper J4 needs to be installed on the MPU004.
--
Rob Anthony
Pinball Classics
http://LockWhenLit.com
Quality Board Work - In Home Service
borygard at gmail dot com

Ahh, I knew it had to be something simple. Do I move the existing jumper from J5 to J4 or do I jump both of them?

#8 6 years ago

Yep, switching the jumper solved it. PHEW!! THANK YOU!

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