The machine had all 8 slots full, I removed, reinstalled had only 4, swapped them around, etc. All no difference. The screen still looks the same. The SIMMS aren't clearly market so I'm not sure what they are.

The 4 SIMMS in the last 4 banks have 2 chips each marked MCM14256AJ10, and have a sticker with 670-0256-A and are made by Apple.

The 4 SIMMS in the first 4 banks have 8 Chips each aXM41C1000AJ-8 and are made by Legend with the model LG 41000

I've tried numerous combinations and all to no avail....