Odd K4951 issue

Robomayhem

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The K4951 in my Jamma Taito cab has a pretty nice picture, bright colors and all for the most part. I have been running a 19-1 on it with no probs whatsoever until last night.

I scored a Tekken 2 board off a fellow KLOVer and isntalled it last night so my daughters could play it for a while, and me too.. It went fine, the colors were bright, no worries.

But later, I put the 19-1 back in the machine and blue had disappeared!?! By that I mean the characters that were supposed to have blue on them, i.e. the suit Dad wears and the Brains in Robotron, Bubbles, etc. did not have any. I was able to crank up the blue cutoff and turn everything blue, but could not get a defining blue at all. When adjusted so everything else looked right, the Dad's suit in Robotron simply blended in with the background. (wave 10 was a real treat... lol).

So I put Tekken 2 back in and it seemed fine, I then put in Thunder Jaws, and it looked superb with a TON of blue just like it should be. So I get a computer monitor and hook that up to the 19-1; perfect picture. Put the the dip switch back to CGA and again, no blue. So i went to bed thinking that i need to get either a 20" LCD, or another 19-1..

But first thing this morning I turned it on and the picture is perfect......... !
So was the tube too warm or something last night? It had been on most of the day.

Is this something a cap kit could fix? When working properly, the picture really is quite nice, but...
 
Another thought is that these new 19-in-1's might be just a tad thinner than the older boards you plugged in later, and the pins in the connector might be making a good firm contact with the blue pad on the 19-in-1 anymore. You can check the blue pin in the connector if this happens again...
 
Thanx for the responses. I will address any cold solder joints when I re-cap it, which will happen sooner than later if this prob continues.

I seated and reseated that connector on the 19-1 probably 5 or 6 times last night to no avail.. But it could be that, although all the boards fit pretty tightly.

I am having party tomorrow night and I know some of the peeps want to play Tekken, but they are gonna have to wait til the end of the night for that at this juncture...
 
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