Netgear WND3400 keeps disconnecting

I bought a used WND3400 on ebay (seller said it was is great working condition, minor cosmetic damage) and I tried setting it up and have gotten nothing but grief.

I hard reset it to factory defaults when I got it, ran the setup wizard at, and configured it using Windows 7. It worked for 3 minutes then it disconnected all the connections. Since then, I have hard reset numerous times, reconfigured it numerous times, and power cycled it numerous times. Now:

--the LAN connection works consistently
--the 2.4 gHz wireless intermittently disconnects and won't let me reconnect for a few minutes
--the 5 gHz wireless seems non-existent.

Screenshot from inSSIDer

How the frog to I fix this so it doesn't disconnect me and I have both dual-bands working consistently? Let me know if there is anymore information I can provide.

I have also been getting a message since I've started using this router that "Windows has detected an IP address conflict." Related?

I watched my router (now that's I can see it lit up at night) and I noticed that it is resetting itself periodically for no apparent reason. Occasionally, I get an error message from Windows 7 that I have an IP address conflict. I looked in my event logs and these looked relevant.

Log Name: Microsoft-Windows-Dhcp-Client/Admin
Source: Microsoft-Windows-Dhcp-Client
Date: 6/12/2012 8:57:28 PM
Event ID: 1002
Task Category: Address Configuration State Event
Level: Error
Computer: Rabbits_FX
The IP address lease for the Network Card with network address 0x68A3C4C88B61 has been denied by the DHCP server (The DHCP Server sent a DHCPNACK message).
Log Name: System
Source: Tcpip
Date: 6/12/2012 8:53:17 PM
Event ID: 4199
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Rabbits_FX
The system detected an address conflict for IP address with the system having network hardware address 00-12-5A-F9-70-1A. Network operations on this system may be disrupted as a result.

Help! I've trying everything I know to try.
10 answers Last reply Best Answer
More about netgear wnd3400 disconnecting
  1. check to see if you can get a firmware update from the Manufacturers site
  2. the firmware is up-to-date I checked. Another website suggested I rollback the firmware to an older version. Worth a shot or no?
  3. Best answer
    do you have a wireless printer or similar with a static IP address?

    do you have a static IP Address set for your PC?

    Is DHCP running on the router?

    I would hold on that rollback for a minute
  4. I'll look into the wireless printer, it's possible my roommate has one.

    I don't think my computer has a static IP but how can I be sure?

    Looking at my router's config page, I see that IPv6 is disabled, instead of being set to Auto, DHCP, PPPoE, or Fixed
  5. IPv6 shouldn't be an issue.

    to chack your IP go to
    Control Panel > Network and Internet > Network and Sharing Center

    Click Change adapter settings

    Right Click on the connection that is plugged in to your router

    Select Properties

    Double Click Internet Protocol Version 4 in the list

    Ensure both Option boxes say get address automatically. If there are numbers there you have static IP
  6. Ok I checked that and IPv4 and IPv6 are both set to obtain DNS and IP addresses automatically.
  7. Click here to see my settings.

    As you can see, I have a wireless n card and DHCP is enabled. I'm still not seeing a 5 GHz broadcast on my computer.
  8. Don't worry about the 5 GHz thats not a speed thing. You should be seeing a Wireless N Network which can operate on 2.4 and 5Ghz Bands and should be selectable in the router setup.

    Do you have Internet Connection Sharing setup on any of the PC's in the house?
    Control Panel\Network and Internet\Network Connections

    Right Click the Network Connection
    Click Properties
    Click Sharing Tab and remove the ticks if any on all PC's
  9. Internet connection sharing is not set up on any computers, and we aren't using any wireless printers.

    I thought I found the solution today when I realized that I was using the AC adapter for my old g router for the new N router. Unfortunately, it didn't fix anything :(

    Thanks for your help, but I've already bid on a new Linksys EA2700. I won't be going back to Netgear anytime soon.
  10. Best answer selected by SerialSniper14.
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