LG 65UH950T - WIFI stops detecting wireless networks after 15 min

I have this LG TV (65UH950T) for about 7 years. Never had any issues until just a few weeks ago when the WIFI connection started playing up.

If I turn the TV on after being unplugged from the wall for a few minutes, the WIFI connects with no issue. But, after about 15 min it losses the connection. When I go to the WIFI setting I see that no other wireless networks appear in the list when searching. If I turn the TV off, unplug from wall and leave it for a few minutes, it will work again, for another 15min.

About 2 weeks ago, I replaced the WIFI Module with a new one. The WIFI worked flawlessly with no issues, But now the issue is back again. I suspect there is something else leading to here since the issue is exactly the same.

The Magic Remote, which uses Bluetooth, and the LAN port work alright.

I couldn't find the Service/Repair Manual for this model anywhere on the web however I found a pretty close model (LG_55UH950V_UD62M.pdf) on this website that suggests to check the WIFI Mac value and Pin 1 voltage (+3.5V), which I haven't gone through that yet. I just ordered a Service Remote Control to check the WIFI Mac Value but it hasn't arrived yet.

Would you be able to lead me to the right direction and advise what I need to do to get that fixed? If you have the Service Manual for this TV (65UH950T), that could provide more details to be helpful as well.

I haven't opened the TV again yet to take new pictures but these photos are from previous attempt.

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Hi @shahram80569,

Have you checked that the latest software version 05.70.30 is installed in the TV?

Your model is in the Reference link

Have you also checked in the Advance WiFi settings to see if there's a setting regarding powering down when not is use?

Don't know what settings are in the advanced section as the user manual doesn't say.


Thanks @Jayeff for your comment.

Yes, the software is up-to-date to this version, and there is no such a setting in the Advance section in regards to powering down. When this issue occurs, the WIFI cannot detect any networks, not even my neighbor's or a hot spot, while I'm in the WIFI setting.



How close is the "hotspot" to the TV?

Try holding a phone with the hotspot enabled (if this is what you can do) <10cm from the back of the TV and check if it detects the WiFi signal.

Not quite sure where the antenna is in the TV so you may have to move the phone around the frame a bit.

If the TV picks up the WiFi signal there's an antenna problem e.g. loose or faulty connection to the WiFi card.


Something weird is going on!

I had the TV running while connected to internet via Ethernet cable for a couple of days (running across the rooms from the other side of house) while waiting for the Service Remote to arrive. 2 days ago, I disconnected the cable and switched to WIFI. Since then, I haven't had any WIFI connection issue!!!

It seems like this is an intermittent problem.

Looking on the internet, there are lots of reports on LG TV (a different model) that have WIFI problem due to cramped ribbon cable. But this one is not too cramped, or any way like the reported videos (on YouTube) when I opened it up last time.

I guess I need to wait and see if (and when) the WIFI starts to play up again.

Is there any usual suspect when there is an intermittent WIFI issue?



if the WiFi is turned on then it could be a signal problem either due to interference or low signal level i.e. just on threshold of being acceptable.

To eliminate the 2nd possibility, if you have a Windows laptop with WiFi capability, download, install and run this free WiFi sniffer program to check the signal levels of your network "at the TV". That's why I suggested a laptop as it is portable so you can position it at the top of the TV where the TV WiFi antenna is ;-)

The program will show your home network as well others that are in range and give you the signal level in dBm as well as the channel that it's operating on.

The dBm values are "negative" values so the higher the number the lower the actual signal strength.

Here's a link that gives an idea of the signal strength values.

Also if you notice that there are other networks operating onthe same channel and they have a strong signal it may cause interference. Change the channel in your router to a quieter one i.e. one that has no or minimal appearances in the sniffer program list.

Most routers default to CH 1, 6 or 11 straight out of the box and hardly anybody ever bothers to change them. Check you router's user manual for how to change the WiFi channel.


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