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I am a 20 year old electrical engineering student who loves old tech. I recently got a new CRT to replace my old one for my setup but this one has a small 7 segment display at the bottom left of the monitor.

The monitor is a Darius with the (I can only assume) model number HRN-14LR. Could someone give me some information on this monitor and what the 7 segment display means?

enter image description here

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  • 7
    Is it 7 all the time or does it change under various conditions?
    – mm201
    Commented Oct 31 at 18:30
  • It changes, but hard to tell what causes it to change. The question was answered down below and after some testing, I can confirm the answer is correct.
    – Donald MacLaggan
    Commented Nov 3 at 12:51

2 Answers 2

Reset to default
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It's indicating the display resolution using an approximation of the number of vertical scanlines. So 7 means you are probably running in 1024x768. It's not entirely consistent because some modes are in the same range, so for example 5=640x480 because 4 was already taken for 640x400.

Edit: The list of modes from the user manual

enter image description here

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    This is more complete than my semi-compiled answer. Source for the info?
    – dave
    Commented Oct 31 at 18:35
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    @dave From the regular user manual. There are scans for the HRN-14LR on schematicsforfree.com in the Monitors - CRT subfolder in the Video folder. The first file you'll find is the user manual and the second file is the same service manual you were looking at.
    – David
    Commented Oct 31 at 18:44
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    Is that an "approximation of the number of vertical scanlines" or simply a number the manufacturer arbitrarily chose to correlate with the number of scanlines?
    – Amazon Dies In Darkness
    Commented Nov 1 at 7:34
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    This may ponder into a separate question (which I don't have time to write at the moment), but I wonder, what was the use of this? Why was this such an important info that it warranted a separate display showing it all the time?
    – Neinstein
    Commented Nov 1 at 14:49
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    @Neinstein Marketing: It looks complicated and has nerd appeal. Some high-end displays even had a mini LCD in the bezel that displayed this information and did the same thing as modern on-screen displays in adjusting settings.
    – user71659
    Commented Nov 2 at 17:24
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Guess from 30 seconds with google - it's the video mode.

See fig 5-6 in the service manual.

The meaning of '7' is however not obvious from the service manual.

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