Com 4 is unresponsive

Acer / Desktop t630 series
October 20, 2010 at 22:31:25
Specs: Windows XP sp3, 1g RAM
Com port 4 is not working. Is there a (very) simple way to fix this? I have only basic computer knowledge. It does not respond to any device.

Thanks for any advice.


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#1
October 21, 2010 at 02:09:00
many other COM ports do you have? and do they work?

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#2
October 21, 2010 at 03:17:50
Thank you, yes, all other ports are working okay.

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#3
October 21, 2010 at 03:29:56
The question was what are they and do they work.

Normally Com4 is a virtual port created by some software. Quit often, Com4 will use the same interrupt as Com 2. It all depends whether what we have is a real port or a virtual port.

A lot of USB devices will create a virtual Com port as the operate as USB to serial converters. If you plug the USB device into a different USB port it will often create a completely different Com port making you think the original port no longer works. In reality, it no longer exists.

So what is the device that you have plugged into this port that no longer works?

Stuart


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Related Solutions

#4
October 21, 2010 at 04:29:51
Nothing works when plugged into this particular port, but they do when plugged into others. It appears to be dead.

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#5
October 21, 2010 at 05:52:42
You are not answering the questions that are being asked and are completely misunderstanding the problem. What is it that you are trying to make work?

You don't plug anything into Com 4. Com4 is something that is designated in software not hardware. You plug the device into either an RS232 Serial Port or a USB port. RS232 Serial ports are linked to either Com1 or Com2, sometime Com3 or Com4. USB ports do not have numbers unless they are used as USB to serial adaptors. The chances of having a real RS232 port linked to Com4 on a computer built in the last ten years is extremely remote.

The chances are that Com4 does not work because it does not exist. Go to Device Manager and look under Ports (COM & LPT). What does it say there?

So what is this device you are talking about. Is it plugged into an RS232 serial port or a USB port.

Stuart


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#6
October 21, 2010 at 13:38:11
Stuart, thank you for your reply.

As stated in my first post, I have very limited computer knowledge, therefore your explanation makes no sense to me, since these *slots* on the tower have been referred to in documentation as *com 3 or 4* or whatever.
I would never expect a beginner in my own field of expertise (and yes, I have one) to have the same level of knowledge as my own. So if you found my question dumb, I apologize.
But I found your remarks offensive, so we will consider this discussion closed.

Have a nice Friday. Thanks to others who tried to help.


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#7
October 21, 2010 at 15:47:55
Just by chance you do read this again Elabear consider this. I fail to see what you find offensive. It was a simple explanation to help you better understand the problem.

It was not your questions that is the problem, it is your lack of answers to questions I asked, You can see what you are doing, I cant. So I need to ask questions to try and understand what it is you are trying to do. No answers were forthcoming. If you couldn't understand my questions you need to take the computer to someone that can.

It can be very flustering at times when you try to help by asking for clarification and non arrive.

Stuart


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