Hi. I need to update my jvc smart tv model lt-55n935

SOURCE: i have a jvc tv lcd model lt-42e488 the green

is a inverter control board defective, need to be replaced.

SOURCE: JVC LT-42DA8BJ

How are you connecting your laptop to the samsung TV? Is it DVI/HDMI or thru more-common S-video cable? I have successfully ported laptop screen to TV with S-Video. After you connect your S-video cable, right-click on blank desktop of laptop and bring up the Display Properties (usually the last entry on pop-up menu). Got to last tab, usually called Settings. You should see two monitors displayed on top part of this page. One of these (most likely #2) is your TV. Click on #2 monitor and check the box that reads "Extend my Windows desktop to this screen" (or words to that effect). Be sure you have the TV turned on and facing you because you may find yourself clicking on icons on the TV screen. You'll probably have to play with which is primary display because some video players have trouble playing to a secondary screen. You may also try the Fn+F8 (CRT/LCD) button on your laptop (those are the keys on my Dell). That may turn on the TV-out on the laptop. Lastly, remember that this will only get you video. You'll have to connect a 3.5 mm cable to you Line-Out port on the laptop and connect it somehow to your TV or SurroundSound speakers. There should be a audio-in port on those other devices for that. Or you can just play the sound thru your laptop speakers.

I'm not that familiar with the DVI-out but I suspect that it would work very similiarly. Good luck.

SOURCE: jvc model no. LT-32p679. cable line was struck by

Cable system is grounded to electrical system. Most electronics have fuses inside. Open it up and look for blown fuse.

SOURCE: I need the USB firmware

Unplug TV, Plug back in. Hold menu and -vol buttons. Push power button and release it. keep holding the 2 buttons for 5 sec. release both button and TV should come on.

SOURCE: 32" JVC LED TV will not play SKY+HD through HDMI

You need to select HDMI input.