Printer (ethernet -> wifi range extender) not working

I got a different one (Netgear D6200).

I think you are referring to the Netgear EX6200 range extender.

...But, the printer doesn't seem to print, from any of my Apple devices, whether on the extender's own network or on the main router's. From the Extender's network, my Macbook Air can successfully ping the printer, which is on a static IP address.

Did you download and install the Netgear ReadySHARE Printer Utility? See the User Manual, specifically Chapter 7 Share a USB printer through the Extender.

The Netgear D6200 is a Wifi DSL Modem Router, while the EX6200 is a range extender. Both are AC1200 devices.

Sorry, I don't think ReadyShare is necessary if your printers are connected via Ethernet to a router. The curious problem is that you are unable to print from both your router and the extender. Do you have Access Control "On" in your router settings?

I see that you tried resetting the printer system to no avail. Have you tried

(a) power cycle all equipment (i.e., shut down and disconnect the power cord of the router, printer, Apple devices, and extender. Wait at least one minute and then plug in and turn on in order the modem (allowing it to fully sync up), then turn on printer, then Apple devices); and/or

(b) re-boot the computer and repair disk permissions with Disk Utility?

I suggest working on printing using the SSID of your router first. Once that is working again, try the SSID of the extender.

On the extender, the default wifi band for the Ethernet ports is 2.4Ghz. That can be changed to the 5Ghz band by manually changing it in the online GUI (Settings > Wireless > Region Selection > Ethernet ports).

Note: I just added a Netgear EX6200 range extender to my network a couple of days ago. All my printers are connect via Ethernet to my wifi router. I can print wirelessly using the router and extender networks.

I'm inclined to agree that it's not your computer. Power cycling all equipment is troubleshooting 101 that many people thank me for suggesting as it solved their problems. I am now remembering that for an unknown reason, I power cycled all my equipment before adding the Negear EX6200 to my network.

Perhaps by coincidence, the dead Amped extender and the installation of the Netgear extender caused some corruption to the configuration settings on the router. Or the configuration setting was corrupt but not apparent until installing the new extender. Anyway, if the problem still persists after power cycling all your equipment then you might try resetting the router to factory default settings followed by restoring a good backup of the router's configuration settings.

I tend to think it's not the router because it doesn't work even when on the Extender's network - I haven't even gotten to trying to get it to work from the main network.

Count how many devices are in your entire network and multiply that number by itself (the same number). That will be how many possible problems can occur and just a wee hiccup among any of those devices and connections could be your culprit.

From your original post:

"...the printer doesn't seem to print, from any of my Apple devices, whether on the extender's own network or on the main router's."

The router must be working properly before the extender can work properly. Meaning you need to be able to print with the printer connected to your router (in your words "main router." That is why I suggested to get your printer working on your router first.

The reason I suggested power cycling all your equipment is because you need to flush the devices memory of the Amped info. Since you are/were using access control on your "main router," did you remove or block the Amped Extender from the Access Control List on the "main router?" If not, the printer(s) might still think it's connected to Amped, so it is looking for that device's MAC address.

Network Printer Troubleshooting

If you haven't done so already, try resetting the printing system.

Reset Printing System