Com Port

  • Thread starter Thread starter John1791
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John1791

I am trying ot use a data trasfer program that has always worked flawlessly,
but all of a sudden, it quit working and now says that my computer has no com
port. I have checked the devise manager and the device manager says that the
com port is functioning OK.

What could be the problem?
 
John1791 said:
I am trying ot use a data trasfer program that has always worked flawlessly,
but all of a sudden, it quit working and now says that my computer has no com
port. I have checked the devise manager and the device manager says that the
com port is functioning OK.

What could be the problem?
Click to expand...
If you had something like a loopback plug you could use hyperterminal to
test it. You could still use hyperterminal to make a connection to the
com port and see if it works.
There are diagnostics in the device manager I think too that will test.
If you connected a modem you could try to talk to the modem.

But all these assume you have the hardware to test with.
You didn't upgrade your OS or anything did you?
 
I am trying ot use a data trasfer program that has always worked flawlessly,
but all of a sudden, it quit working and now says that my computer has no com
port.  I have checked the devise manager and the device manager says that the
com port is functioning OK.

What could be the problem?
Click to expand...

Go into the Device Manager and check for the complete resource details
(IRQm IO address etc.) for the COM port. Serveral COM ports may not
use the standard IRQ settings (IRQ 4 for COM 1 and IRQ 3 for COM 2.)
Most every PCI based COM port do not!
 
I am trying ot use a data trasfer program that has always worked
flawlessly,
but all of a sudden, it quit working and now says that my computer has no
com
port. I have checked the devise manager and the device manager says that
the
com port is functioning OK.

What could be the problem?
Click to expand...

Go into the Device Manager and check for the complete resource details
(IRQm IO address etc.) for the COM port. Serveral COM ports may not
use the standard IRQ settings (IRQ 4 for COM 1 and IRQ 3 for COM 2.)
Most every PCI based COM port do not!
 
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