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The issue likely stems from your router/modem, not the TV. Your network (modem and router if separate) should be rebooted by unplugging for 10 seconds at least once a month although it wouldn't hurt to do so bi-weekly. Modems, particularly cable modems are notorious for keeping everything cache'd and filling up without releasing. Doing regular network reboots will likely resolve your issues on your wireless signal dropping. If it continues there may be a problem with the wireless signal from the router, interference from other devices, hardware issue, etc. Word of advice, if  modem/router is nearby it is always better to use an ethernet (wired) connection fewer potential problems to deal with.

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In the link  I posted above you'll probably find the answer. 

first of all,  turn off QUICK START  in the TV settings.  If that doesn't work,  change the security protocol to wpa2 (not sure if this is relevant). 

of course all this is applicable if your TV has the same "symptoms" my TV had. 

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What I have found is that lg is not fixing this issue they have known about for multiple yrs I see reference of this is as old as 2014. This has nothing to do with your network at all, I am a network engineer and this is an web os issue. 

First I scan the WiFi signal near the tv I find it is strong and there are multiple networks around however the tv doesn’t see any of them at all.

second I turn off quick start, no change also the security setting is not a fix due to the fact the Web os has either shut off the WiFi board or lost it in code an can’t locate it again until reboot again this is lg issue not yours

restart tv is a solution but not reasonable this would mean that I would have to reboot the tv multiple times an hour something I don’t have to do with anything else in my WiFi network with this regularity

third I try to setup the network manually this proves just as bad as auto settings because the WiFi turns its self off and without rebooting the tv has no fix at all

lg engineers obviously haven’t a clue as to how to fix this issue or are intentionally not looking into this issue

now I have read of people having lg repair replace WiFi cards and mobs however this still doesn’t fix the issue. So I ask how is this related to my network when everything else on the WiFi network works as expected .....it isn’t you it’s lg failure 

lg stop blaming the consumer of your bad product and fix it

i look forward to an update to your faulty WiFi software and hope it comes soon

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Well just to throw my hat in to the ring, I have been running my UH650V on WiFi since November 2016 without a single (TV) issue.

Check your wireless access point is not being affect by an external source.  It was necessary for me to replace one of my TP-Link access points as every time the microwave was used the signal would drop, after switching to a Ubiquiti Unifi AC Lite unit resolved the issue. 

If you are using the 2.4GHz spectrum for your WiFi then check what other household items you have that could be causing problems, for instance cordless (non-DECT) phones have the potential, although very small, to cause issues.

There is an article on Wikipedia that details what devices use the 2.4GHz spectrum: 

link hidden, please login to view

Check regularly that none of the neighbours have over lapping WiFi channels, always select a free or least used band.  Do not trust that your modem/router that has the ability to select the best band will actually do the job, I have found that many do not.

If all else fails get a cable, still by far the best means of connecting a network device in terms of stability.

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On 4/7/2018 at 7:07 PM, Damh11 said:

What I have found is that lg is not fixing this issue they have known about for multiple yrs I see reference of this is as old as 2014. This has nothing to do with your network at all, I am a network engineer and this is an web os issue. 

First I scan the WiFi signal near the tv I find it is strong and there are multiple networks around however the tv doesn’t see any of them at all.

second I turn off quick start, no change also the security setting is not a fix due to the fact the Web os has either shut off the WiFi board or lost it in code an can’t locate it again until reboot again this is lg issue not yours

restart tv is a solution but not reasonable this would mean that I would have to reboot the tv multiple times an hour something I don’t have to do with anything else in my WiFi network with this regularity

third I try to setup the network manually this proves just as bad as auto settings because the WiFi turns its self off and without rebooting the tv has no fix at all

lg engineers obviously haven’t a clue as to how to fix this issue or are intentionally not looking into this issue

now I have read of people having lg repair replace WiFi cards and mobs however this still doesn’t fix the issue. So I ask how is this related to my network when everything else on the WiFi network works as expected .....it isn’t you it’s lg failure 

lg stop blaming the consumer of your bad product and fix it

i look forward to an update to your faulty WiFi software and hope it comes soon

To prove my point again I have continuously lost WiFi signal. So I added an WiFi extender right next to tv, still continuous WiFi shut down on the  tv. Luckily the extender has a Ethernet port on it which I used directly to the tv, and walla no more disconnect proving once a for all LG has an issue with either their hardware or software that they are not engineering to find the fix. To bad great tv but the WiFi is complete crap and is being ignored.

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