Apple 1 build stuck on Video section tests

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Apple 1 build stuck on Video section tests

Good morning,

 

Im buiilding an A1,

I have power working, but I am stuck on the video section. When I power it up, green stripes appear across the screen, and the 7427 chip heats up so much that I can't touch it (see attached image). I have replacement 7427 chips arriving on Tuesday. If that resolves the issue, I'm all set somehow I don't think IIl be that lucky.

 

Does this look familar to anyone as a known issue?

 

Whats the next logical step after swapping the 7427?

 

Thanks