58L7300U - Wifi does not stay connected

Question

Comcast cable using a Xfinity branded ARRIS TG862 Wireless SOHO Router.
Two Toshiba 58L7300U TVs mounted on walls in residence.
LAN is setup and stable.  The Router has been properly configured using WPA2 AES encryption.  All computers (Apple, Microsoft Surface, Dell and Toshiba) access WiFi with no problems.  All Smart Phones access WiFi with no problem.
The two Toshiba 58L7300U -  they have a problem.  Even PC Magazine has noted the issue in their test lab.
http://www.pcmag.com/article2/0,2817,2428099,00.asp
"The 50L7300U supports Wi-Fi networking, but the set was unable to stay connected to any of our wireless access points here in the labs. It saw each access point and would connect for a brief moment, but each time it would lose the connection. The wired LAN connection worked perfectly, however."
We've been through every possible setup.  I was on the phone with Toshiba for 2 hours and they finally capitulated there was a problem.
Both TVs were purchased just prior to Chistmas 2013.  They both have software version 7.2.67.31.01.1 (5/22/14).
If we get the TV to access WiFi I can use PING -T to ping the TV IP address.  Yet the TV would say it can't get a connection.  It is on the LAN.  It has a TCP/IP stack and it can been seen from the POV of the Router and can be seen by another computer on the LAN.
One TV could get access, for a while.  It could access Pandora and YouTube content.  Then it LOST the ability out of the blue.  Othertimes the TV would see the SSID and from the Router POV I would enable WPS and then have the TV do a "scan".  Then it  it would say it can't find an Wireless Access Point.  I have done setups via;  manual, assisted and use WPS.
All I can say is that there is a BUG in the software of the 58L7300U in accessing a Wireless Fidelity networks and for a $1,000 per TV that's atrocious.
Personally, I'd hard wire the units but the owner doesn't want that.  
The owner spent $2K, and wants the product to properly access WiFi.
Dave
Attachments:
TG862G_User_Guide.pdf ‏2351 KB

Answer 1

If you are having WiFi problems it is necessary to isolate whether the problem is with your network or your iPhone. Note: Do NOT consider your network to be blameless if some other devices can connect to it.
First, test your iPhone on some other WiFi networks: work (apparently has problems), a friends, Starbucks, Barnes & Noble, etc.
If it works well there then the problem is probably with your network. Try restarting your WiFi router by removing power for 30 seconds. If that does not help check for a firmware update for your router. If none exists which corrects the problem consider replacing the router.
If your iPhone does not function well on other networks it possibly has a hardware problem. You could try Settings > General > Reset > Reset Network Settings to see if that corrects the problem. If not, contact Apple Support or visit an Apple store for evaluation. They can provide a replacement if your iPhone is bad.
If you need more help please give the make, model, and version of your WiFi router and how you have it configured.
See also here: http://www.apple.com/support/iphone/wifi/