For clarification, is your Roku device not connecting to the internet? If so and the affected device is either a Roku Express or Roku Premiere, please note that they are only compatible with wireless b/g/n networks on the 2.4 GHz spectrum. Ensure that your router is broadcasting a 2.4GHz Wi-Fi network for the device to connect to. You can check your device model by navigating to Settings > System > About.
You can also try configuring your router and use wireless channels 1, 6, or 11 which are the preferred channels in North America. Each time you change the wireless channel, you will likely need to apply/save changes before you are prompted to restart the router.
It would seem that my Roku is too old to be compatible with my router; the Roku itself is a few years old. Thank you for your help.
I doubt that's the case. An old Roku may no longer be supported and some channels may not run on it, but unless it has broken down it should still connect to a properly configured net.
You haven't mentioned your Roku model and model number (available via Roku menu path Settings > System > About).
ALL Rokus should connect to a router operating in the 2.4 GHz band. Only those with dual band wifi also can operate in the 5 GHz wifi band, check your router.
There are a couple of network connection problems recently being reported that have been caused by updates to routers. These have primarily been reported with routers supplied by internet providers, but it's possible they could also occur with user-owned routers that have received updates.
ROKU LOCATES NETWORK AND REPORTS NETWORK QUALITY BUT CANNOT CONNECT Some router updates have changed the router's connection settings from b/g/n to just g/n, causing some Roku models to lose their ability to connect to the network. The solution is to set the router's configuration back to using b/g/n.
ROKU CANNOT FIND LOCAL WIFI NETWORK Some routers (reported from Xfinity and Cox, but there may be others) have had their 2.4 GHz wifi band turned off, leaving only the 5 GHz band operational. Devices with single band wifi radios, notably Roku Express and Premiere models (but not Express 4K models) as well as many other single band devices can not even see the 5 GHz band. The solution is to reconfigure the router and turn the 2.4 GHz band back on.
If this problem was not caused by a router update deactivating the 2.4 GHz band, often a restart of the router (even if other devices are still connecting) followed by a restart of the Roku will allow the connection to be reestablished. Depending on your Roku model and Roku version number you'll find the System restart option under either Settings > System or Settings > System > Power.
If you need to make configuration changes on equipment supplied by your internet provider but you have no access to its settings, you may need to request your internet provider to make the changes for you.
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Re: Everything else in the house works; error 016?
This was my problem, as well as solution; my router was showing up in the list but not connecting while all other wifi devices working.. I went into the router config and switched it back to b/g/n
*LOCATES NETWORK AND REPORTS NETWORK QUALITY BUT CANNOT CONNECT Some router updates have changed the router's connection settings from b/g/n to just g/n, causing some Roku models to lose their ability to connect to the network. The solution is to set the router's configuration back to using b/g/n.