(PLEASE HELP)Is There a Problem With My MacBook Pro Retina?

[sadeck123]

Hi.
I noticed that when using my 15 inch MacBook Pro (Mid 2014 DGPU) on a lower resolution like 2560x1600. I get these horizontal white lines. However when i turn the built in graphics switcher off the lines don't show up. Is this normal?

 

[maflynn]

I don't have my MBP in front of me, but I don't recall every seeing what you state when I've modified my resolution.

 

[sadeck123]

I don't have my MBP in front of me, but I don't recall every seeing what you state when I've modified my resolution.

I have had 3 units,all the same spec and it's the same problem. This happens only when i lower the screen res to 2560x1600.

 

[ano0oj]

Not normal...take it into Apple I'm sure they'll recommend a GPU replacement

 

[blueroom]

What program are you using to get 2560x1600?