Trouble with serial port

[Roberto]

I have a PCMCIA reader installed on my serial port. I has worked great for many years. Recently, it just stopped working. I thought it must have been the device. So, I purchased another card reader and still no success. What is the best way to find a solution to this problem?

[glc]

Any flagged devices in device manager?

[Roberto]

Not that I am aware of. How do I find out?

[Al Pollock]

control pannel ,system, hardware , look for yellow exclaimation mark

[Roberto]

No flagged devices. All appears normal.