My lg tv screen dims when I switch from cable to tv app like netflix

Where your Smart TV already has an app in its app pages, start that app, log onto your Netflix account (which you need to pay for) and watch away.
If your TV does not have a Netflix app, give Player a try at http://www.Playora.com - this is an app that runs on a PC and lets you open content on the screen of the PC and toss it to a lot of different Smart TVs (Samsung, Panasonic, LG, Sony, JVC, etc.). Ithing, It will be helpful for you.

moved you out of computers, its not.
why just do Netflix, there are like 1000 streaming sources online, now, try more, like vudu, hulu, amazon, or 1000 of free ones. endless. to try, in the LG app screen for players, see em?
did you speed test your unstated ISP connections?
did you try the TV using hard wired to router with ethernet cable.?
use wifi test last, wifi is problematic.
if wifi tv is far from router it will be slow.
if wifi is overloaded in your HOOD , then it will be slow.

own a PC, try it yet, connected wifi and for sure ethernet
see it or runs Netflix and say 5 others ok ?
run Inssider.exe program see of wifi is jammed up?

not once did you say wifi, and I bet it is.
we have a gigalan , ethernet jack in every room here.
I pulled all land line cables and switch them all to ethernet
so now if wifi goes NUTS, wired works.
btw, wired not one error in 2 years, not even that pesky buffering error, on Netflix.

gee even NEflix has speed test to see if HD mode even works.
for you.
if others in your home are tying up wifi gee, there you go.
wifi is shared resource,
good luck

Connect the Apple box to the TV with a cable. Using the TV remote select the input port you connected the apple box to. ie HDMI.

Click the center button on your apple remote. You should see a Netflix icon. Select it and then log in to your Netflix account

How do I get Netflix to work on my LG Smart TV?
To do so:

1. Press the Smart button on your remote.
2. Then click the More icon near the bottom right.
3. Hover the pointer over the the Netflix App and a small x will appear above it. Click the x.
4. Open the LG Store App, search for Netflix, then choose Install.

How to set up Netflix on your LG Smart TV

hi Jonel.
see if this helps you out.
Method 2 Smart TV

1. Determine if your TV is a Smart TV. Smart TVs connect to your home network, and can run media streaming apps such as Netflix. ...
2. Connect your Smart TV to your home network. ...
3. Open your Smart TV apps. ...
4. Select the Netflix app. ...
5. Log in with your Netflix account. ...
6. Browse using your remote.

6 Simple Ways to Watch Netflix on TV - wikiHow

How do you set up Netflix on TV?
Connect your Internet-ready television either with an Ethernet cable or wirelessly to your router. Follow the steps on the television to connect it wirelessly. 2. Select theNetflix Apply from the menu on the television screen.

How to Set Up Netflix Streaming for a TV ' Chron.com

smallbusiness.chron.com/set-up-netflix-streaming-tv-27369.html Search for: How do you set up Netflix on TV?
if this does not help go to this link might help you.
how to get netflix on my tv Google Search

Open the Netflix app and sign in to your account!

If your Sony Blu-Ray player and LG TV are recent models, each should have an HDMI cable connection. HDMI is an method to connect your digital video and audio devices with just a single combined cable. In the case of your LG TV, using an HDMI cable will allow you to send the HD video signal to your TV's screen, and allow you to hear the sound through the TV's speakers.
Your LG TV may have multiple HDMI connectors, to allow other devices to send signals to your TV, such as a cable box or satellite box or digital video recorder (DVR). Your Sony Blu-Ray player will usually have just a single HDMI connector.
Purchase an HDMI cable from your local electronics store. There are different versions of the HDMI specification, and you should get a cable that you can verify is certified for the HDMI version 1.4 specification.
Plug one end of the HDMI cable into the Blu-Ray player, and the other end into one of the HDMI connectors on the TV, noting which one you selected.
When you turn on your Sony Blu-Ray and your LG TV, you should use the remote for the LG TV to select the input source. Your LG remote should allow you to select the HDMI input connector you used, at which point you should see the display of a DVD playing on the Blu-Ray player. If you cannot hear the sound, use the LG remote to increase the TV volume.

I had the same problem the bottom line is call Netflix and they can walk you through it

Netflix Customer Phone Number Shortest Wait Best Support

888-638-3549

I had the same problem with my Vizio XVT473SV. I couldn't find the Netflix Activation Code. When I clicked on the Netflix App, the TV would ask me if I wanted to connect to Netflix, then it would ask me if I was a Netflix member. After clicking yes to both, it would tell me it couldn't connect to the Netflix server, check with Netflix.com/tvhelp. After a couple hours of troubleshooting, the solution was......your first use of the Netflix App has to be via the Ethernet Port/Cable. This will give you a screen with the Activation Code, after you activate the code in your Netflix account, you can go back to using WiFi on your Vizio TV to connect to Netflix. Step by step instructions are...
1) Exit the Vizio Netflix App.
2) Physically connect an Ethernet cable to your broadband (just temporarily)
3) Check to make sure the Vizio is using the Ethernet port and not your WiFi (Apps Button - HDTV Settings - Network...may have to reboot the TV to get Ethernet port connection)
4) Start the Vizio Netflix App
5) Click OK to start the Netflix App
6) You should now see a different screen that gives you the Netflix Activation Code.
7) On your Computer, Login in to Netflix,
8) Click on "Your Account & Help" link on upper right corner
9) Scroll down to Watching Instantly on your TV or Computer section
10) Click on Activate a Netflix Ready Device
11) Enter the Activation Code shown on your Vizio TV and click Activate
12) Once your Netflix account (on your computer) shows it is active, your Vizio TV will automatically log in. You should see your Instant Queue.
13) Exit the Netflix App, unplug the Ethernet cable, Turn Off your Vizio TV.
14) After 20 seconds or so (remember the TV is software driven), turn the TV back on and your WiFi should connect again.
15) Use your Netflix App and this time it should automatically connect via WiFi
note: just make sure that your wireless DSL/Cable Modem or Wireless Router is not blocking your WiFi connection request from the Vizio. You can check the connection status in the modem/router or in the Vizio in the HDTV Settings - Network.