Netgear WNR3500 v2 – Factory Firmware Recovery

The Story:

I have a Netgear WNR3500 v2 ho i used to play with experimenting some passive war-driving techniques with DD-WRT and Open-WRT firmwares. Now i use it inside a HotSpotSystem but before that… passing from a firmware to another can be a pain in the a$$…

This is a guide on how to “unbrick” your Netgear WNR3500 v2 after a bad firmware update, trying to update over wireless, or even if you wish to restore after a DD-WRT or Open-WRT bad update.

  • Before you continue below, make sure you’ve first tried a hard reset to revive your router:
  1. Disconnect the router from all cables except the power cable.
  2. Push reset button for 30 secs.
  3. Without releasing reset button, disconnect power cord.
  4. Hold the reset button for another 30 secs.
  5. Replug the power cord.
  6. Still hold the reset button for another 30 secs.
  7. Release the reset button and give the router about 10 secs to resettle.
  8. Disconnect power cord for another 10 secs and then reconnect.
  9. All should be in default settings now.

NETGEAR Firmware Recovery Utility Maximum completion time: 15 minutes.

You only need to use this utility if the firmware on your NETGEAR router is corrupted. Generally, this will only happen if you lose AC power to your router or computer while you are updating the firmware.

To determine whether or not the firmware is corrupted: 1. Make sure the router is powered on. 2. Check the status of the Power LED, . If the LED blinks continuously, the firmware is corrupted.

Recovering your Firmware

1. Reinstall your Firmware a. Make sure your PC is connected to your router and the router is powered on.

b. You can run the Firmware Recovery Utility either from the CD that came with your router or the Netgear Update Assistant program group. To run the utility from the CD, insert it into a CD drive on your PC. If the CD main page does not appear, double-click Autorun.exe on the CD. The Firmware Recovery Utility will be either directly accessible from the initial navigation screen or from the menu entry Supporting Software. When the new navigation screen opens, select Run the Firmware Recovery Utility. Alternatively, to run the utility from the Netgear Update Assistant program group, click the Start button in the Windows system tray, and select All Programs. Click the entry for the Netgear Update Assistant program group, select NETGEAR Firmware Recovery Utility.

c. On the setup screen, click Next and follow the prompts. The utility will automatically test the firmware in the router to check that it is indeed corrupted and, if so, will automatically attempt to recover the router using a known good copy of the firmware.

d. When the firmware recovery is complete, the utility will start the assistant automatically.

2.Restore your Firmware Configuration Settings Most versions of the Configuration Assistant ask you whether you want help setting up your wirless network. If you did not save any configuration settings when you originally set up your router, click Yes, please guide me through the options. Click Next follow the prompts provided by the Wizard.

If you saved a backup of your configuration settings after you originally set up your router:

a. Click the No option and then click Next. The Configuration Assistant will read the default configuration settings and then open the Basic Settings screen in the Setup menu.

b. Click Backup Settings in the Maintenance section of the menu. c. Click Browse… and navigate to the configuration file stored on your PC, which will be a file with a .cfg extension.

d.When the firmware recovery is complete, the utility will start the Configuration Assistant automatically.



UPDATED 12.07.2012 

3 thoughts on “Netgear WNR3500 v2 – Factory Firmware Recovery”

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