Black Lines on Performa 400

[Octolingual]

What are these black lines that show up on my Performa 400?? I suspect it has to do with the VRAM, but idk if the module itself is bad, or the traces, or if it’s even the VRAM at all. Anyone have any ideas?

 

[Byrd]

VRAM! Any chance you've another module from another Mac to test?

 

[Octolingual]

VRAM! Any chance you've another module from another Mac to test?

Unfortunately no. I wish I did.