DK Jr. and DK board issues

MCA

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With the help of orion3311 I finally got the monitor in my DK Jr. back to life. Time for Junior to save Daddy! But I'm having problems.
Title screen and opening scene are fine. Once the Vine level begins the snapjaws become clustered together (photo 1) and then begin coming from the bottom of the screen in garbled fashion (photo 2).
I can make it through to the Chain level but more problems. All six keys appear but only three will move. Once you start moving the keys the others disappear from the screen (photo 3) plus the snapjaws and birds are again garbled and come from the bottom of the screen (photo 4). Of course the game is over at this point.
Any ideas on how to fix these issues?
 

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I also have a Dk board that was given to me untested.
I plugged it in and this is what I get.
How do I go about troubleshooting/fixing this?

Thank you in advance,
Morgan
 

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I also have a Dk board that was given to me untested.
I plugged it in and this is what I get.
How do I go about troubleshooting/fixing this?

Thank you in advance,
Morgan

Looks like a bad Z80 CPU, at least that's what mine did.
 
I finally had some time to go and look over the DK board. I was going to check the Z80 socket and reseat the chip but I found this in it's place.
I think it's a HS save kit but there are no markings on it.
Anyone have any ideas?
 

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That looks like the Eight Ball Action daughtercard that was used to convert DK/DKJR to 8 ball action, I have that card and the romset, just bought all the DKJR roms, z80, and the sound processor to convert the JR board I have back.
I put it all together and got a screen full of junk, think maybe I need to go through it all again.
 
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