Serial port not working anymore...problems with Windows XP?

[Tesoptics]

I tried to use the Hyperteminal in echo mode and it gives me only one character i sent which on the working pc is two.

and nothing that i type appear if i disconnet pin 2 and 3.

Can you see what is going on?

regards,

tes

[JakTrak]

Ben I'm having the same problem, my laptop (Dell Latitude 620), the serial port doesn't transmit, it receives ok, using hyperterminal (XP). you mentioned a floating ground, how can this be resolved, will just a ground connection work, or do I need to create some type of a ground protection device as well.

JakTrak

[vinithanalla]

Hello

I am having the same issue. I am presently running a test for a different compenent with same functionalities using the same program(which has the issue) and the program runs fine.

- I copied my present program from the old computer (windows XP) to new computer (windows 7) changed all the required communication settings to talk to an AG 34980a.

- I was able to talk to the DUT's using a communication VI , but when i started the Main Test VI the program stops and cannot connect to the DUT not going any further once it hits serial port ICON.

- I use IO agilent library to see if the correct output is scanned to the correct channel from the DUT as requested.

I am using Labaview 2011 on both old and new test computers, any changes that I can make to fix this issue?

[spaceman_spif]

vinithanalla - I had similar issues transferring a VISA read and write program that worked fine in XP to a computer running Windows 7.  What finally worked for me was I created a small VI that merely opened the COM port session, flushed the I/O buffer, did a CLR, then CLOSED the COM port.  I ran that VI one time, and after that all my com port issues went away.

I wish I knew for sure what had happened, but my best guess is something grabbed a hold of my COM port in the background and wasn't letting go, despite rebooting the computer and everything, until I ran that little VI.  Give that a try.