Problem with connect to serial port


Thread Starter
Sep 14, 2009
Hi all,

I need your help as I have got a problem with connect to the serial port on my motherboard. I have plugged the usb at the back of the set top box and I have plugged the male serial to the female serial adapter then to the male serial port at the back of the motherboard. When I plugged it there is no blue light come on my set top box. I have plugged the usb at the back of the set top box to the front usb port on my computer and the blue light come on so it works fine. There is nothing wrong with the serial cable that I plugged to the male serial at the back of the motherboard as the cable are brand new. I cant connect to the set top box using serial so I guess that it could have been disabled on the motherboard.

The name of the motherboard I have got is called ASROCK 980DE3/U3S3.

Do you know why I cant connect to the set top box using serial?

How I can enable it and get it to work?

I need to connect to the set top box using serial because i want to use putty software to command with the set top box. The putty software will not connect to the usb so i have to use serial to connect to the set top box.

Any advice would be much appreicated.

Thanks in advance.


May 12, 2011
The problem is very likely the serial to USB adapter. You can get all kinds of cables and adapter to connect almost any type of connector to another type of connector, but unless the device is designed to work in that configuration, you are just wasting your time.

Have you had this working previously? Most setup boxes have the USB port disabled or configured for external storage.

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