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Unusual Computer Port

Hi, I am a computer novice, but wondering if anyone knows what this unusual port is called on the back of my laptop? It is a female port, small circle, same size as an s-video. It has 2 lines of holes, one line with 4 holes and another with 3 holes. It also has 2 indents for a proper fitting of the cable. I wish i could attach a picture but this dialog box wont let me.

Thank you

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Clarification Request
Picture how to.

In reply to: Unusual Computer Port

Use some image hosting site like Imgur then share a link to your image.

All Answers

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Answer
Sounds like the old PS2 mouse and keyboard ports.

In reply to: Unusual Computer Port

Post was last edited on December 4, 2018 10:45 AM PST

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Port

In reply to: Sounds like the old PS2 mouse and keyboard ports.

That's the one! Thanks for that. I am having a really hard time finding this online. I need a male 7 pin mini DIN to a female 9-pin serial cable.

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Identifying the port

In reply to: Port

That's not too hard but very few laptops used this odd port for serial ports. In fact over 2 decades over thousands of laptops, not one.

The recurring use for such a port was video related. Either the rare video input or the more common video output. The reason for 7 pins was to get HD Video out of the laptops (pre-HDMI days.)

In the future share the make, model and approximate year so folk can find out what this port does.

Need a serial port? That's USB for me. Here's the adapter I use today in the apps I wrote starting in about 2000 to present day. You can see it at https://smile.amazon.com/gp/product/B00425S1H8/

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RS-232 port

In reply to: Port

The old serial port that was most often used for serial mouse and for dialup networking modems like these, US Robotics being a very popular choice at the time.

https://www.engineersgarage.com/articles/what-is-rs232

https://en.wikipedia.org/wiki/RS-232#Physical_interface

There was the early 25 pin version and then the 9 pin version later, but older computers often had both on them.

It's old 8 bit tech. What are you trying to do with this old tech?

I always find it easiest on old stuff like that to check the Images on Google instead.

Post was last edited on December 4, 2018 7:47 PM PST

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Port

In reply to: RS-232 port

So this is taking the image on a laptop and sending it to a Daktronics video board. The video board is older, 10 years old, and we use this setup to display a timing system onto the board. I am going to try the 9-pin serial to USB and see if that will send the image. Daktronics doesn't have the cable and I cant seem to find it anywhere.

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For video, not RS232.

In reply to: Port

As I suspected it's the video in or out port. I see I dropped a hint the make, model of the laptop would be required but if you are going to use some USB to RS232 given the story so far I would not try that.

If this is for a DATA connection then some of the boards out there used a serial link to program the board.

If this is for a video link and if over a decade ago my bet is they had a custom solution using a laptop of that day and the din video output.

I've turned on tracking in this thread. If you want to supply more detail that might help. As to Daktronics not finding a cable, in the companies I worked we could manufacture a replacement cable if the drawings were still around since we always used standard plugs and connectors. Just buy the connectors and wire it up.

When we would not do that only happened when the client wanted the cable for less than it would cost to make.

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ask Daktronics for...

In reply to: Port

... a wiring schematic and pin-out chart.

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