Monster Bash (Classic Edition)
Chicago Gaming Co., 2018Hello,
I just acquired Monster Bash for a discounted price as the screen is not working. I replaced the screen, but its sill not working . Any idea how I can trouble shoot this ?
Here's a link showing the pinball
Any help would be greatly appreciated
Thanks
David
Video marked private. Can’t view.
Which version of MB? B/W or Chicago Gaming?
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
You have an original Monster Bash made by Williams. The display looks totally dead, which is caused by a problem on the high voltage section of the driver board. It might be a fuse, but it will probably need to be rebuilt.
You have an original Williams WPC95 game there. Test all the voltages at the DMD power connector. If any of the -110, -100, or 62v is out of spec, ChrisHibler will be happy to repair the A/V board for you.
Also, if the voltages are out, you can go with a ColorDMD and not worry about repairing the board.
https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Testing_DMD_Controller_Power
Quoted from davidmb:How do I check the voltage on the DMD connector ?
Post #7 with a multimeter set for Vdc or V== depending on the labeling on the meter.
Quoted from davidmb:Also, the pinball emits 7 beeps continuously , the documentation shows: 7 Beeps: S7 sound ROM failure
Assuming the ROM is oriented correctly, sounds like a bad sound ROM. Post a picture of the (top) A/V board.
Quoted from PinballManiac40:Assuming the ROM is oriented correctly, sounds like a bad sound ROM. Post a picture of the (top) A/V board.
Here's a picture of the AV Board - Also, I noticed LED100 and LED102 are off on the power board.
MB-AVBoard (resized).JPGYou still haven’t told us what the voltage measurements for the display are.
I can see that someone partially replaced the HV section on the board but didn’t replace some of the most failure prone parts.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
You have been led to water. Now drink. 
https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Testing_DMD_Controller_Power
As it says in the link ground can be the backbox braid or the side rail.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
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