General discussion

Locked

serial port cables

By steve.doig ·
I am having trouble getting a mouse running. I was advised that it may be the cables between M/B and serial port. Apparantly there are 2 types: pulling back the port face, the wires run from the horizontal cross-section of the cable either up-down-up-down etc to the pins or something different to this (up-up-down-up...).

The problem occured after changing a Pentium TX m/b to an earlier version of this m/b. I've tried the usual troubleshooting; just wondering if there ARE actually different types of serial port cables and if there are I shall try them.

This conversation is currently closed to new comments.

13 total posts (Page 1 of 2)   01 | 02   Next
| Thread display: Collapse - | Expand +

All Comments

Collapse -

serial port cables

by dmiles In reply to serial port cables

It may be that you need to make sure the orientation of the cable is matched to the connector pin one to pin one,look at the cable and see if the cabled is marked with pin 1,most cables are interchangable.Cable could be defective rather than different,try another cable.

Collapse -

serial port cables

by steve.doig In reply to serial port cables

Poster rated this answer

Collapse -

serial port cables

by Ian McLean In reply to serial port cables

If you look at the cables the red line (pin 1) is either solid or dashed. Some motherboards are particular about which one they want. Just as a suggestion, make sure that the bios settings are ok and that you have the cable plugged in correctly. I have seen more than one machine where the cables where one row up or to the side. good luck. Ian.

Collapse -

serial port cables

by steve.doig In reply to serial port cables

Poster rated this answer

Collapse -

serial port cables

by McKayTech In reply to serial port cables

Unfortunately, while the pins on the DB9 or DB25 connector are rigidly defined, those on the motherboard are not, so a cable from a different motherboard may or may not work.
So to answer your question, yes, there are different serial port cable configurations.

However, for a given motherboard, the two COM connectors (DB25 and DB9 usually) are usually interchangeable (i.e. either one can be plugged into COM1 or COM2 on the motherboard) so you might be able to try the other COM cable, although you might need a DB9/DB25 adapter.

paul

Collapse -

serial port cables

by steve.doig In reply to serial port cables

Poster rated this answer

Collapse -

serial port cables

by wgcormier In reply to serial port cables

Steve, I've had the same problem. The answer seems quite confusing (but here goes).
True there are two different types of serial cables one type runs horizontal the other vertical. What distinguishes the two is the
texture marker on the side of the cable top.
As far as I can determine there's a coarse one, and one with stripes (or ridges). I've been successful in trying hit-and-miss with these two types of cables with a 90% success rate.

wgcormier@yahoo.com

Collapse -

serial port cables

by steve.doig In reply to serial port cables

Poster rated this answer

Collapse -

serial port cables

by fred_e944 In reply to serial port cables

Are you referring to DCE & DTE cables as the 2 types? The difference is in whether 1 pair of pins (pins 2 & 3 I think) are wired straight through or crossed-over (pin 3 to pin 2). Just check which type you need and verify that you have the correcttype. (I think Modems are DTC devices, but thats from a possibly foggy memory)

Collapse -

serial port cables

by steve.doig In reply to serial port cables

Poster rated this answer

Back to Desktop Forum
13 total posts (Page 1 of 2)   01 | 02   Next

Related Discussions

Related Forums