Tempest- missing colors?

pringlez

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Hi, I have a tempest, And it worked perfectly, untill a few days ago, certain colors disapered. Yellows became white, reds became pinks, etc. It plays fine, and other colors are unchanged (blue, green etc) here's the weird part; the other day I was in the red levels, and it properly displayed the colors, so I know it CAN display correct colors it just somtimes (usualy) doesn't. And just a few hours ago, it was running in attract mode, and then it started showing all the changed colors correctly. But, this lasted only a short time untill it returned to incorrect colors... Does anyone have any ideas what could be causing this, and if there's a fix?
 
Sounds like a monitor problem most likely. Do you have either another monitor, or game you can swap to see if the problem follows with the monitor, or the game board?

When was the monitor re-built last?
 
Sounds like a monitor problem most likely. Do you have either another monitor, or game you can swap to see if the problem follows with the monitor, or the game board?

When was the monitor re-built last?

I don't have a spare monitor, or board for testing. This monitor has never (as far as I know) been rebuilt.
 
Well I would start with at a min recapping your monitor. It's going to be a bit difficult to T/S without spares. But I've not seen a Tempest board set yet that's caused color problems. But I suppose it could happen.
 
Hi, I have a tempest, And it worked perfectly, untill a few days ago, certain colors disapered. Yellows became white, reds became pinks, etc. It plays fine, and other colors are unchanged (blue, green etc) here's the weird part; the other day I was in the red levels, and it properly displayed the colors, so I know it CAN display correct colors it just somtimes (usualy) doesn't. And just a few hours ago, it was running in attract mode, and then it started showing all the changed colors correctly. But, this lasted only a short time untill it returned to incorrect colors... Does anyone have any ideas what could be causing this, and if there's a fix?

I would try reseating the board edge connector.
 
Super old thread but is exactly what I have going on. It is not the monitor. I tested that. It is also not the connector. I tested that as well.
 
14 year NecroBump.

Not the worst, but pretty bad.

The Op hasn't been on since 2017.
 
One thing I have noticed in my bench wiring (From an upright machine) for Tempest is that the R,G,B wires get a bit funky in the 15 pin mate-n-loc connector. That may not be the issue, but might be work checking. I noticed I was missing red on mine, and it was on all boards. A quick re-insert push of the pins on the plug and back in business.

Edit:
Ah, I missed where you said you tested the connector.
 
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