Arcade Collecting > Miscellaneous Arcade Talk

What's Wrong with this Ms. Pac?

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sc1103:
One of my friends has a good quality Ms. Pac machine, but it recently stopped working.  According to them, it boots up and then there is just garbage on the screen, with a blinking zero in the upper right.  I thought it may be the Z80 (but im an arcade newb) so does anyone know what I need to fix this and where to get it?  If you guys need pics Id be able to get out there tomorrowish.

Thanks for any help

RayB:
It can be any number of things. Bad RAM, dying capacitor. Power supply problem or simply something came loose. (Did they move the cab recently? Did they start using a really long extension cord?)

At least you know it's not a problem with the monitor.

sc1103:

--- Quote from: RayB on April 18, 2005, 11:06:29 pm ---It can be any number of things. Bad RAM, dying capacitor. Power supply problem or simply something came loose. (Did they move the cab recently? Did they start using a really long extension cord?)


--- End quote ---

They haven't moved the thing since they got it and have been plugging it in through a surge protector the enitre time.  Any suggesstions on how to narrow down the problems? 

Thanks again
If I post pics can that help at all?

RayB:
Step 1 is always a visual inspection. You never know when something could have just come loose on its own, or a little furry critter may have decided to make the cab its home.

Step 2 or 3 is measuring voltages from the power supply.

Step 3 or 2 is putting the game into test mode if it has one and see what the results are.

Step 4 ...?

General Zod:
You might want to check out this site, as it's helped me in the past, and might just do the same for you.

http://users.erols.com/mowerman/pacfile.htm

It covers quite a bit on troubleshooting your pac boards.

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