Is this a possible ram issue or hitting display?

The logic board was replaced a while back and something like this was displayed back then, but I read somewhere that it was a ram issue. Thought it was fixed, but recently have been using the Powerbook to scan with an old Epson Profection 2450 Photo scanner, preferring the old scanner driver. The display is close to the door of the scanner and I bumped the display and all of a sudden it suffered from the dreaded first image. I pulled out the memory and exchanged the different ram with the bottom and top and shows the 2nd image.

Exchanged ram from an older Powerbook g4 1ghz and still is displaying the 2nd image.