Different presentation size on two different chromeboxes using same presentation

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We have 2 Asus chromeboxes displaying on 2 Vizio TV's (same model/size) using the same Presentation. Yet the displaying images are completely different. One screen is full size while the other screen is 3/4 size.  Trying to figure this one out put it is puzzling to me.
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Charles Amershek

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Posted 3 years ago

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Robert Schoneman, Champion

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Are the Chromeboxes the same model? When you say the image is "3/4 size" do you notice any cropping/clipping of the image or any stretching/squeezing of the image or is it the correct aspect ratio and image but merely not filing the screen? I'd start by checking the aspect ratio settings on the displays as well as the underscan settings. Be sure they're the same on both displays. Also some TVs have a "PC" HDMI port which works differently than the video HDMI ports. 
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Ray Durkin

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Hi Charles,

This sounds like a resolution setting on the chromebox.  Have you verified the resolution on the new chromebox is set the same as the previous?  Just curious - is the one showing 3/4 screen the new one?  If so, it sounds like the new one is auto detecting a higher resolution and you'll need to manually reduce it to match the other one.  What is the resolution of your presentation?
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Charles Amershek

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Thanks for the responses. Chromeboxes are the same model. Display 1 has a 1920x1080 and Display 2 has a 1919x1080. The presentation was setup aat 1800x1130 to fit Display 1 completely. Using the same presentation it does show 3/4 screen.  Robert, it just isn't filling the screen on Display 2.
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Matt Huesmann

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Did you check the TVs to make sure they are not on Zoom, Wide or some other Aspect setting?
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Charles Amershek

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Thanks Matt...that's the first thing I did and both are set to Normal viewing.  will work on it more tomorrow.
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Robert Schoneman, Champion

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Charles, how did you arrive at the 1800x1130 resolution? I'd encourage the use of a standard presentation size and then work towards the displays showing it correctly. What you're seeing on Display 2 with a presentation of that resolution doesn't surprise me so it sounds more like Display 1 is the issue. Have you checked the underscan/overscan settings on the displays? 
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Matt Huesmann

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The Vizio tvs only have 3 to 4 presets zoom wide standard etc. they don't really do overscan and underscan which is what he was responding to above . I agree with you I would do a 19 20 x 10 80 presentation and check that on both monitors first
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Robert Schoneman, Champion

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I'm not sure if it's the issue here but I want to take an aside on the overscan issue as this is something I've run into quite a lot when people use TVs in a pro AV environment. Anything that's labeled as a "TV" is, almost certainly, going to overscan by default. That's what TVs do as the outer 5% (typically) of the raster is considered "bleed" in the TV world. Doing digital signage we want all of our pixels and the only way to get them is to be sure the display isn't overscanning. Different TVs handle this in different ways so I can't offer a specific solution here but there's usually an option to defeat it. 
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Matt Huesmann

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Understood- I responded because I have this exact setup in my office as a test. Asus chrome box on a Vizio with no issue.. I agree tvs are all different and can present problems. HDMI vs pc inputs etc..
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Ray Durkin

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Robert - great comment thank you.  We see this often.  Just as another note to add to this, it's easy to spot the difference.  If you are seeing your content being cut off on all  sides of the TV, it's overscan that needs turned off.  If you are seeing content being cut off on just the right side and bottom of the TV, then it's a resolution issue.