Hi folks.

Just bought my first table on Saturday, Haunted House. Soooo damn excited.

Everything's working well except none of the score displays are lighting up (all five in the lightbox and the one under the lower playing field).

After examining the pcbs behind the lightbox I've found the PSU board has a completely burned-through zener diode (CR7). I've seen other photos with this exact same destroyed diode. Would replacing the zener solve the problem with the displays?

Or would it be a problem with the connectors?

I've tested each display board by removing all of them and plugging only one in at a time. None of them work so it appears to be a problem with the source. Perhaps that zener or the connectors. I haven't checked the connectors yet (will do that when I get home tonight).

Photo of pcb here:

http://voroleaf.com/pinball/HauntedHouse/images/IMG_0141.JPG

I plan on doing all of the System-80 mods that pinwiki recommends for this table but wanted to ask everyone here about the displays.

I have the schematics, user manual, B.H.H.H.C. pdf and Gottlieb Technical Seminar Workbook pdf so I have documentation out the wazoo for reference.

Thanks!

-Bob

IMG_0141.JPG