Turn tv on it turns right off..after 3-5 seconds...there's sound for a few secs.

LG LED TV has no picture (black screen) but still sound ...

www.tomsguide.com/answers/.../led-picture-black-screen-sound-fixed.ht...

7 days ago - My 32' LG LED TV has suddenly lost picture! The sound is all right but theScreen is pitch black. After switching it on the picture flashes for a second and thenthe ... LG LED TV has no picture (black screen) but still sound - can it be fixed? Tags: ... a touch on the screen reveals nothing so it's not the back light.

Monitor going black after 2 seconds [Solved] - CCM.net

ccm.net > Forum > Hardware

Oct 9, 2012 - Brightness goes down, display draws less juice, and you can at least use .... it's the LCD's Inverter ... you have to replace it for it to go back to ... If the screen is turning off every two seconds or so and then it comes ... i turn my tv on it comes right on, but then after a few minutes turns off, .... Digital Trends for LG. No display in monitor
Jan 11, 2013
Ps3 and hdmi cable
Oct 8, 2012
More results from ccm.net

TV with Black Blank Screen Repair How to Troubleshoot ...

? 3:16
https://www.youtube.com/watch?v=kFdVi2ejfzA

If the theft security system is activated because of the stupid cold then you have to turn the key to the "on" position for 11 minutes then shut it off for 3-4 seconds then on for 11 min. then off for 3-4 sec then on one more time for 11 min. then off for 3-4 sec then start it. that's what our son's grand prix or am does. right now it's running in reverse, stuck in the snow and doors locked. husband had to take son 25 miles to new job and come home and try to unlock car before all the gas is used up yipee hope prior advice helps

Suspect number one is not fan, lamp or Color wheel--optical light engine with dmd is.

3 capacitors on your deflection board cp150 2200uf 16v cp114 cp120 220uf 35v

It varies as to what is actually making the TV shut down. Shorting the connectors on the A.C. plug have nothing to do with it turning back on. Its just the fact you are unpugging it for a few moments.

you either have leaky capacitors near the voltage regulators, cooling fluid leaking on the boards, and/or bad solder connections on the yoke plugs. this model is known for all 3 problems, but you probably need a qualified tv repairman to fix this right.

those tvs will try 3 times before completely shutting down. you can try and take the back off and check CP150 it is a large capactior located near the middle of the board on the left hand side(looking from back) if it looks and feels like the top is vented or puffed out then that could be the problem. if not i suggest having a qualified service tech take a look because there are too many things that could be the root cause.

disconnect the power and hold in the power button for 30 seconds to reset it.

convergence ic bad

could be three different things.

 

1. could be the crt itself as a tube with dfective phosphure wil do this

 

2. could be the vertical ic on the crt board

 

3. could be the focus pac.  located in front of tv with 6 adjustment knobs on it.