My lower left 7 digit display doesn't work. The other three work great

Here's what I checked - Looked at all the header pins and display pins with my USB microscope, all good.
Flipped the ribbon cable around, no difference. Checked continuity of the ribbon cable, all good.
Power supply voltage at 3J5 pin 3 = -104 v , 3J5 pin 4 = +98 v
Voltage at display, pin 7 -95.4 v, pin 31 -95.7 v, pin 6 80.1 v, pin 34 80.4 v

Is there a way to tell for sure if this display is out gassed or is there any thing I missed?
I just picked this machine up and it looks like the other three displays have been replaced at one point. This one looks original.

Does anyone have a working 7 digit display in their stash they would like to sell?

Thanks in advance for any help.
f14 display.JPG

I was working on this in a dimly lit area and it looked pretty black.

Are you thinking that if it has even a little glow it's probably out gassed? No glow might mean something else?

I'll check it again at lunch time and focus more on seeing a slight glow rather than glaring numbers.

Looked again for a faint glow in darker conditions, none.

Anything else to look for or does anyone have an extra display they would part with?

Thanks again for any help.

Maybe this pic is better. Is this what burn looks like?
new-1.jpg

What's my options? Send it to someone to have this display replaced I guess.

I read in another thread about some upgrades on these boards to lower the voltage and possibly increase the display life. At the price of these replacement glasses it seems like a wise thing to do.

I don't mind doing some simple board work like re-flowing header pins but these tiny traces intimidate me a little and I'd rather not do this work myself and risk disaster.

Anyone have a good recommendation for this?

Thanks for the input guys,

This display is one of the old ones with the lamp holders on it. It's hard to find a replacement LED one for this and the ones I've seen are around $340. Anyone seen it cheaper?

Guess I didn't do my research very well when I bought this game. I'm going to be really upside down on this game before it's finished.

That makes me feel less worse Pac. Mine is complete and mostly working. Just need to deal with a little cabinet damage, broken plastics, display and raised inserts. But I paid too much for it! Live and learn.

JohnW thanks for the most generous offer. My wood speaker/display mount was kind of beat up so I machined a new wood one in my work shop. It came out really well and everything fits perfect. I also fabricated new steel speaker grills to replace the plastic, warped ones. Just need to stencil on the "W" logos.

Are the newer style LED displays wired different than the old ones like I have? If they are plug and play interchangeable and the newer style display will fit your panel with my machines wiring then that would be great.

I'm not afraid of woodworking so making a new speaker panel to fit the newer LED displays is an option as long as I know they are compatible. I guess I'll be calling Rottendog tomorrow to see if they can help.

photo.JPG

I want to make this pin a keeper and think I should bite the bullet and go LED if I can retrofit the newer style. I'm sure it's just a matter of time before the other 3 displays start giving me grief.

Thanks for all of your support.

John, here's a drawing I made to remake my speaker panel. Does yours measure out the same as these dimensions?

I'm getting some conflicting information between the manufacturers about the plug and play compatibility. Not how it physically mounts but wiring and function.

I'll post when I find out.

spanel.JPG

I talked to Jim at Rottendog and Brett at Xpin and they both confirmed to me that their later style display boards will will also work in the early F 14 machines. It sounds like the speaker/display panel may need to be modified to accommodate the later style display but I believe it's only a matter of mounting hole placement.

I think I'll go ahead and order one and should know in a week or so.