I had the same stripy pixelated thing on a fixer upper. Also suspected the logic board or graphic card. But I was wrong: When I booted it holding D to do the hard ware test, my monitor was showing no lines. I aborted the test, and booted from another external HDD, and it came up without the pixelated stripes. So I used that boot up to erase the build in HDD, which by the way had been maxed out, restored that HDD with a fresh OSX, and voila....no more stripes. My conclusion: Always fix the most likely component to fail: the HDD.
Update (02/06/2019)
@imacpain1 rich, I would say that the fix I found is still working: I did send in the GPU and had it repaired in California, by http://stores.ebay.ca/brickfence.
Not just a reflow, but had a new chip installed on the GPU, came to about US$ 140."
"I did send in the GPU and had it repaired in California, by http://stores.ebay.ca/brickfence.
Not just a reflow, but had a new chip installed on the GPU, came to about US$ 140.
After that I needed to replace the HDD as well. Since this model is very touchy about what HDD it wants, I needed to order a conversion kit for about US$40, so it now allows any old HDD, including even 2.5"" SSD. This concludes my fix, she is up and running smartly now, for hopefully another decade."
im having this vertical line issue having attempted swapping my optical drive for ssd. Put it all back together and the screen looks like this all over! Not a hint of partial image or anything. Any ideas please folks?
