On 6/27/2012 11:40 AM, VanguardLH wrote:
W. eWatson wrote:

Char Jackson wrote:

W. eWatson wrote:

I have Subject switch, and one of the led lights, port 1, is blinking
off and on. The connection to port 1 cannot be seen from the other two
PCs on my LAN. The other two PCs can see each other. Up until recently
this 3 PC LAN was working fine.

I've reset the switch several times, and nothing changes. I rebooted the
PC on switch 1 and it hasn't changed the behavior. Checked the
connections and they seem solid. Switching the PC port to another port
produces the same blinking. Comments?

I had a 5-port D-Link switch a few years ago that did the same thing.
The condition was permanent; the switch became a 4-port switch. I
guess it's lucky that you only need 3 of the 5 ports, so you're still
in good shape.

The connection produces a blinking light on any of the three ports I've
plugged it into. The other PC works fine on any of these ports.

So you are saying the problem moves with the problematic PC. A port on
the switch that works with other PCs stops working when you plug the
problematic PC into that same port. As you move the problematic PC
between different ports on that switch, the problem moves, too.
Obviously you have something wrong with that problematic PC since the
problem moves with that PC.

So what is upstream of the switch? A router? Have you tried plugging
the problematic PC directly into the router (or whatever is upstream of
the switch) instead of using the switch for that problematic PC?

Could be you are always moving the same CAT5 cable with the problematic
PC. How long is the cable that is connected to the problematic PC? It
should be 100 meters, or less. Maybe you have a defective cable. Have
you tried using the cable from the problematic PC with the other PCs
that worked okay? Test or replace the cable from the problematic PC.

Otherwise, it looks like you have a problem back in the networking for
the problematic PC. If not a problem with the cable, and since every
port in the switch works when the other good PCs are connected, the
problem is downstream at your PC.

According to Netgear's manual found at:

ftp://downloads.netgear.com/files/FS...stallGuide.pdf

They're LED state descriptions indicate that the LED should be blinking.
They say continuously on is a problem. So I suspect the LED blinks when
the switch detects activity. That is, when there is traffic through a
port then that port's LED will blink. So your problematic PC is
generating traffic. What you did NOT mention is if the problematic PC
cannot connect anywhere. If this PC is supposed to have Internet access
through the switch up to a router up to a modem and out to your ISP,
does it have Internet access? Is the only problem you have is that your
other intranet hosts cannot connect to the problematic PC?


Well, this turned out to be a simple problem. I figured it had to do
with the PC, so I put an XP laptop on the cable. The light stopped
blinking. BTW, it's a slow blink. Once per second or two. However, I
couldn't see the other PCs on the LAN, so I looked closer on the back of
the (desktop) PC, which is in a difficult to see the back. I found I had
a built-in ethernet port and two on an internet card. I found that on
the troublesome PC port that pushing hard apparently did the trick. All
seems well now.

Thanks for your help.

I did run into more trouble when I hooked up a Win7 PC laptop. I could
get a Login dialog to the other PCs, but couldn't sign-in. I'll worry
about that another day.