Roku in 1080p mode

[Masta K]

So I've finally gotten my Roku up and running with my home setup and I'm totally loving it!

I just have one problem. When I set the Roku to 1080p (i.e. Select that I have a 1080p TV) the picture quality deteriorates quite dramatically. I have blue horizontal lines flashing across the screen every few second. Quality returns to normal when I go back to 720p but then I'm assuming that it is down sampling.

Anyone else having these issues?
Anyone been able to solve it?

 

[DrJohnZoidberg]

I don't have that issue. Are you going through a receiver or is it connected straight to the TV? Also what TV is it?

 

[Chevauxza]

Don't have that problem on mine - try checking if your HDMI cable to faulty/try a different one. I have seen cables work on lower resolutions but struggle with artifacts on higher ones.

 

[Masta K]

Directly connected via HDMI. I'll replace the HDMI cable quickly and check if that's the problem.

 

[Masta K]

Just replaced the cable with my PS3's Sony cable and it's working perfectly.
Thanks to both of you for the suggestion!