TNK III Board Problem

gongos

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Is there anywhere/anyone that could look at a TNK III board. Has some graphics glitches and won't register credits. Basically, it's just a glitchy demo. I already cleaned all the pins on the entire board--made no difference.
 
Prolly un-repairable... I'll buy it off of you, how much you want? ;)

If you've re-seated all the ICs and cleaned their legs, and cleaned the edge connector, then it might be time to suspect bad RAM. Does that game have a built-in RAM test of any sort?

(PS-hold down PL1 button during boot-up to enter test mode)
 
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Prolly un-repairable... I'll buy it off of you, how much you want? ;)

If you've re-seated all the ICs and cleaned their legs, and cleaned the edge connector, then it might be time to suspect bad RAM. Does that game have a built-in RAM test of any sort?

(PS-hold down PL1 button during boot-up to enter test mode)

The Ram and Roms all check out OK, but still no credits and screwed up graphics.
 
Regarding the coin-up problem: Does it start and play in freeplay mode? (dipswitch settings here: http://www.arcade-museum.com/dipswitch-settings/9998.html)

Regarding graphics glitches: A photo or two might help in understanding the type of problem it might be.

Well I finally got around to putting in the TNK III board to take some pictures. I changed the dip settings and was able to get the game to start. Besides the graphics glitch, the game moves horizontally instead of vertically and only about 4 inches of the screen can be moved in. Pics are too big not sure how to get them on.
 
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