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Unstable network connection

This is a discussion on Unstable network connection within the Networking Support forums, part of the Tech Support Forum category. If you have any idea on what's going on I would appreciate it. I have gone through 3 routers in

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Old 01-31-2009, 09:22 PM   #1
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If you have any idea on what's going on I would appreciate it. I have gone through 3 routers in as many weeks and haven't been able to figure out what's going on. The first two died, the current one is running but unstable. I have a PC hardwired, a server hardwired and a couple network devices hardwired. When everything except the PC is connected the lights on the Router blink as I expect. By that I mean they mostly stay solid and blink once and a while when data is being uploaded or downloaded they blink. However when I plug in the PC, all 4 lights on the router flicker about every 5 seconds simultaneously as well as the normal blinking. This is causing an unstable connection in that I'm having trouble staying connected to the server and internet. What would cause the PC to cause all 4 lights to flicker reguarly and how do I fix it?
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Old 02-02-2009, 06:13 AM   #2
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Please supply the following info, exact make and models of the equipment please.

Name of your ISP (Internet Service Provider).
Make and exact model of the broadband modem.
Make and exact model and hardware version of the router (if a separate unit).
Model numbers can usually be obtained from the label on the device.
Connection type, wired or wireless.
If wireless, encryption used, (none, WEP, WPA, or WPA2)
Version and patch level of Windows on all affected machines, i.e. XP (Home or Pro), SP1-SP2-SP3, Vista (Home, Business, Ultimate), etc.
The Internet Browser in use, IE, Firefox, Opera, etc.

Please give an exact description of your problem symptoms, including the exact text of any error messages.

  • If you're using a wireless connection, have you tried a direct connection with a cable to see if that changes the symptoms?
  • For wireless issues, have you disabled all encryption on the router to see if you can connect that way?
  • Have you connected directly to the broadband modem to see if this is a router or modem/ISP issue?
  • If there are other computers on the same network, are they experiencing the same issue, or do they function normally?

On any affected computer, I'd also like to see this:

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

Type the following commands on separate lines, following each one with the Enter key:


PING yahoo.com



Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.
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