Chosen Solution
Almost immediately after startup, my Mac goes to these large black checkered diagonal lines. I’ve run diagnostics and nothing was found. I’ve already had the video card replaced in the past, so I don’t know what this is. Does anyone know? Thank you
Sadly, your GPU’s V-RAM has a problem! Lets give this a try restart your system and the T key to see if you can get into Target Disk Mode if you can you might see the FireWire icon on the screen. It might take a few times to get it to show up also try resetting the PRAM as well.
