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No colour video from Apple II Europlus



Hello,

I have another problem with my Apple II Europlus.  It will not output
colour video.  Everything is in black and white, but dithered.  I have
tried with PAL (as should work with the Europlus) and NTSC.

There is a Kaga-Taxan RGB card installed.  Could that be interfering?
I have tried with it removed from the slot, but not removed entirely
because there is a wire from it connected to one of the chips on the
motherboard that I am yet to desolder.  I have played around with the
variable capacitor on the motherboard as well that is supposed to
adjust hue, but it makes no difference.

Any thoughts on what to check?

Thanks

Ken