Question about 3Com 3C16985B SWCH 24-PT 10/100 3300XM (NS3C1084)

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Anyone seen ths before?i

I have 2 of these switchs both doing exactly the same. All 8 "unit" lights are green but the power/self test light is orange. Also all 24 port packet and status lights are permanently lit with the exception of port 7 which both flash. Any ideas?

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Re: Anyone seen ths before?i

When it flashes it usily means its connected if it dosent work at all you should get a new hub

Posted on Aug 12, 2007

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Network fails through one port going orange

The ASUS site has a quick start guide (I read Version 3) that says the lights show blue for connections and blink blue for activity. Sometimes orange indicates a connection at a lower speed. What happens when you try a spare port? What is connected to the 'orange' port? What do the lights at the other end of the suspect patch cable indicate? Note that the manual isn't great because the titles say Gigabit Ethernet but the text talks about 10/100 but not 1000 megabit ethernet.

This is a layer 2 device and it ain't exactly the cleverest box on the LAN. If you move devices to other ports, it is supposed to figure that out dynamically. You should be able to eliminate devices one at a time to determine which port or device is defective. Start by eliminating the 'orange' device. If the router is disconnected can you still print?

If you have limited functionality with the suspect device disconnected, the problem could be with that device. Sometimes cables can be a problem. Not likely but it is necessary to check by substituting a known good cable on a link. If the problem goes away, it was the cable.

Remember to photograph the initial configuration with your smartphone. That can help you when you forget where you started. Label the wires with masking tape if there are no other labels, so you can find your way back to the starting point.

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Amber lights on all ports

It's either busted (not completing it's self test) or you have the wrong power supply (and it may now be busted as a result)

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CSH-800 8-Port Ethernet Switch Problem When i switch the power on, only the POWER LED light up and nothing is happened, computers cant detect it

Switches arnt not detectable by the computer, a switch allows you to link multiple pcs togethers that sit on the same domain/workgroup , and also network subnet, the other lights will come one when you connect a RJ45 cable between the unit and a PC to show a port is in use.

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I have a DLink DES-1008D 8 port switch. ! port connects to dsl router/modem and the rest connects to 7 PCs. I have sometimes seen that all the lights on switch is blinking rapidly 1 by 1 or sometime no...

Are you using the original power adapter ?

Use only CAT5 UTP fast-Ethernet cables no longer than 80 meters.

Connect just 5 or 6 computers to see if the problem resolves. Sometimes the internal buffer on the switch (the store-forward buffer) gets full, so the switch resets and stop forwarding packets until it get it's buffer cleared.

I hope it will help you.


Mar 08, 2011 | D-Link Networking Hubs & Switches

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My linksys network switch is not connecting network computer, what can i do to get it back to work?

Do you have any activity lights on the Linksys? If not your switch has no power a hardware problem. Try to power off for 5 seconds and restore power on the Linksys unit. Try to shut down (do not restart) all computers. Are all the activity lights off? If not again power off the Linksys for five seconds and restore power. Power on the computers and verify the activity lights are now green for each computer. If the computers are not networked and the activity lights are green, check your network settings on your computers, which could have incorrect TCP/IP settings or workgroup. If one activity light is not green for that Ethernet connection, check your cable connection or replace the Ethernet cable. The workgroup should all be the same name. The TCP/IP address should be the same with the exception of the last set of host digits which should be unique to each computer address.

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D-Link Ethernet Switch Lights Flashing and No Internet

You seem to have a problem with the switch or its power supply. If you have another D-Link device with the same power supply (see the volts and amps on the sticker), we may try switching them.

I one had a problem very similar to yours and changing the power supply solved the problem.

Apr 16, 2008 | D-Link Express EtherNetwork DSS-5+...

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Dell Powerconnect 2016 All leds are on, solid no blinking.

Had same problem with my Dell Pwoerconnect 2016, power it on and all LEDs light up but nothing works.
The problem was traced to one or both output capacitors ( 10v 680uf ) on the ( tiny ) power supply.
Capacitor symptoms include bulging or rounded tops instead of flat like new one and the rubber plug in base of capacitor protruding.
Capacitors need to be replaced.
I have successfully replaced with 10v 1000uf and 10v 1200uf, both Rubycon and Sanyo brands.
Power to the switch board is now restored and the switch is able to function just fine.
Give it a go and see if it works for your Powerconnect.

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4 Answers

All the bottom lights flash, then the top light above 8, over and over

Hello all

jpmchugh, I know this response might come to you a bit late, but none the less it might help others who have this issue. I had exactly the same problem until recently, and looks like I found the solution (at least for me). So I thought I'd share it here, since I have not seen a real solution on the various forums I've visited through.

The one common thing I've noted when searching on this and other forums re the 8 bottom blinking lights and then the top right blinking light, repeating over and over again was about a power surge / storm etc.

The exact thing happened to me. A couple of months ago there was a really bad storm, we had a black out in our area and there were some spikes in our electrical systems.

When the black out was over my Gigabit switch was doing the same routine re the lights. The problem for me was the actual power supply unit.

This Switch I've had is about 1.5 yrs old, dunno if I can claim it on warranty from dlink. I've checked the dlink au website and it quotes 5 years, but dunno if it covers storm damage.

Anyways, I took the faulty power supply and the switch to my local jaycar store today. The sales guy noted that the output should be 7.5v, however when he did a test, it was actually showing 12v. He said that the switch must have some sort of built in protection, cause usually supplying 12v to a device that needs 7.5v should have fried the device.

We tried out a replacement power supply and bang.... back in business.

The only kicker was that the replacement power supply cost me around (AUD) $39.95, cause it's one of those fancy multi volt ones. If you can find one that is fixed at 7.5v it might be a cheaper option

Please let me know if this has solved your problem.

Dec 06, 2007 | D-Link DGS-1008D 8-Port Gigabit Ethernet...

2 Answers

Hardware Problem

Probably a bad power supply. Is it getting through power on self test? Any LEDs illuminated when you power it on? Best way is to first connect a terminal configured at 9600,N,8,1 to the console port and then power it on. If you see it running through self test in a few (10-30) seconds, then it's starting up, watch the screen for any errors. If not, then your power supply is probably shot.

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