I was going through some photos for work and noticed little black lines on the base layer that looked like guidelines. After talking to my boss we found out it wasn't guidelines and that they were randomly placed there. After going through the rest of the photos, where those black lines were the pixels were removed from the photos. I have an image example here
Anyone know how to fix this? I've tried cloning over it and using the spot healing brush but it won't work for some reason... It's not on the photos because if I remove the base layer with the black lines theres noticable transparent lines missing from every layer.
If you apply Layer > Layer Mask > From Transparency to the affected Layer/s and disable the Mayer Mask is the content present?
If they don't respond to being edited, then they are likely video card artifacts. Try turning GPU acceleration off in the Preferences, or changing its settings. If that helps, make sure the video card driver is up to date from the card maker's site.
One more thing to try, but I don't think it is the cause, is the cache levels in Preferences > Performance. It needs to be any value other than 1.