Wi-Fi & connectivity

[sabatro]

Was there an update on 2/28 that may have caused my Roku to stop working with our LG TV? The TV suddenly shows no signal. We had a solid blue light on Roku device until I started troubleshooting. Now it's blinking blue. I've tried using two other HDMI ports, unplugged and replugged all cables, reset my router, tried a fresh HTML cable and finally did a factory reset using a paperclip in the pinhole. I believe the reset may have worsened situation since we previously had a solid blue light but now it's blinking. My other devices at home are able to find/use our Wifi so it's not a router issue. We only have one TV so I can't test roku elsewhere. It's a Roku Express 3900r purchased 2019. I realize it's old but it's worked flawlessly until this first issue.

[sabatro]

correction for my original post - I tried a new HDMI cable (not HTML)! thx for any suggestions

[AvsGunnar]

@sabatro 

The Express 3900 is a 2.4ghz-only device. (cannot see or use the 5ghz band of your network).  The flashing blue light generally indicates loss of network or internet signal/connection.

Even with no internet, you should not be receiving a "No Signal" message ion your TV screen, as this usually indicates loss of a video signal from your device to your TV. (Unless, by 'No Signal', you mean you are seeing the Roku Home Screen and it says 'No Connection').

First thing first.  If indeed a 'No Signal' message, try powering your Roku device using a USB power adapter at the wall instead of TV USB port if currently doing so. (try cell phone charging adapter 5volts, 1 amp).  Then try using a different HDMI port on your TV and/or cycling through the Inputs to see if the video signal comes up.

For the blinking blue light, will usually need to regain network connection.  Restart your modem and router and verify in your router settings that the 2.4ghz band is On/Enabled and working.  If using a cable ISP (internet service provider), verify that Wireless Mode b/g/n is enabled as well. (under the 2.4ghz settings).

Hopefully just using the power adapter and restarting all the network equipment will get you going again, but feel free to post back if still having issues after checking the above things.