Some TV's display correctly others constantly refresh

  • 1
  • Problem
  • Updated 3 years ago
  • Not a Problem
We have 4 TV's at the school (3 the same and one different). The single one will display a 1920x1080 while the others will only display 1024 x 768. At least this is what I found I needed to do to get them all working.

The single TV and one of the other three is now displaying the presentation but resets the display to blue and reports:

unsupported video format
1024x768 VGA 60 Hz

for a few seconds and then resumes the presentation. The other two seem fine.

All TV's are receiving the same display set to 1024 x 768.

Any thoughts are welcome.
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Ncc Video

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Posted 3 years ago

  • 1
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Blake Freeman, Official Rep

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Ncc Video,

It sounds like you may have a video card driver issue, or possibly an issue with the display (TV) itself. Since I don't know too much about your specific hardware, you may want to contact the vendor that you purchased the Displays and Media Players from, or, if you have an IT department, ask them to make sure the video drivers are up to date on the media player that is causing issues.

Let me know how it turns out!
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Ncc Video

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Thanks Blake,

I'll investigate further the video card driver updates.
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Ncc Video,

Curious as to what you were able to find out. Let me know!
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Ncc Video

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No chance to investigate. Hopefully next week.
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RV News

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I had problems with one screen, RV was recognizing that screen as 1280x720 instead of 1920x1080.

This solved my problem (Win 8.1)

Right click on desktop shortcut
Go to Properties
Click on the compatibility tab
Check "Disable display scaling on high DPI settings"
Click OK or Apply
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Blake Freeman, Official Rep

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RV News,

Thanks so much for your contribution!

NCC, let us know what you find out!
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Ncc Video

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Long delay - seems my teaching is getting in the way of my IT work :o)

We are running Muxlab's Active VGA Balun II model 500140 and 500141. The computer is set to 1024x768 and is running Win 7 Pro.

Unfortunately (RV News) I do not see this option in the Win 7 setup - worth a try.

Today I updated the graphic drivers on the computer - no luck.

I tried to move the offending TV from the 500141 to 500140 - no luck.

Below are a few screen shots of what is happening.

I have tried to vary the refresh rate on the computer - no luck.
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Nathan Cummins

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Ncc Video, are you running your display through a CAT to HDMI extender or is it plugged directly into your media box?

I'm not sure if this will help but I had a similar issue as you are describing. I had a client whose screen was constantly turning off and on and flickering. Turns out the CAT to HDMI extender that my client already had installed was only compatible with HDMI 1.3, where my units were built to the HDMI 1.4b specification, so naturally they did not work together.

We just had to upgrade their CAT to HDMI extender to one capable of HDMI 1.4 and it worked perfectly from then on. They're usually advertised as something like "CAT6 to HDMI" and say they're "capable of resolutions up to 4K" or something like that.

If you're not running a CAT to HDMI extender, though, you might want to check out the HDMI specifications that your screen and unit is running off.

I hope this helps!

EDIT: Actually ignore me, I just noticed that you're using VGA and not HDMI so this probably doesn't help. I'll leave my comment here in case anyone else has a similar problem though as it took a little while for us to figure this out!
(Edited)
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Nathan,

No worries...Any suggestions help :o)

I've taken over this role from another teacher so I'm new to the ITC position. Last year we just used this setup to deliver a PowerPoint slideshow to the TV's. Nothing fancy, I may go back to it and see if the issue was always present with the offending units. The other thing I have not tried is just having the desktop of the host computer displayed to see if the same behaviour occurs.

This would obviously help me trouble shoot to see if there is a problem with the extender or if there is something about the player/feed the TV's don't like.
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Blake Freeman, Official Rep

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Ncc Video,

After looking at your photos, this looks like it's a problem with the display itself. Rise Player does not display a blue screen at any time, unless the presentation is set to a default background of that color. It could be the video port on the media player, the display, or the cable. Definitely not related to Rise Player though!
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Ncc Video

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Thanks Blake. I'm still trouble shooting to see where the issue is and appreciate your feedback.