What is the problem if the sound comes out but no picture?

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10 Ways To Fix A TV That Has A Picture But No Sound ...

removeandreplace.com/2013/11/14/10-ways-fix-tv-picture-sound/
Nov 14, 2013 - If your TV has a picture but no sound coming out of the speakers, thereare a few things you can easily check. ... See below for the best solutions to fix a TVwith no sound. ... Television Has No Sound Answer 1: Make sure TV is not muted.

There is no sound or low volume coming from the TV ...

https://us.en.kb.sony.com/.../there-is-no-sound-or-low-volume-coming-f...
Aug 15, 2015 - There is no sound or low volume coming from the TV speakers. Article ID: ... Make sure no headphones are connected to the TV. Verify that the ...

Picture But No Sound TV - Bright House Networks Support

support.brighthouse.com/.../Picture-But-No-Soun...

Bright House NetworksIf you have picture but no sound. Press to ... Ensure that the audio and video cables are connected to the same inputs on the TV. For example, if ... My BHN App.

No sound from my TV via HDMI when my cable box is ...

I believe that model has a logic board in it and that is what it sounds like to me. That is just off top of my head, but I believe if you will notice the standby light it will be blinking so many blinks and stop and then blink again. If so this is a code that you can look up on the Samsung web site and plug in your model and it should tell you what just say ~ 4 blinks means. I worked on so many and it has been a while but I believe the last one I had was a Samsung and I put a logic board in it. If I can be of any further assistance please let me know.

If the backlights for the screen do come on and you also have 12v and 5v feed the main board then it does sound like the mainboard will need to be replaced.

check the oscillator

We Start tv Then Sound come But Picture Is Not come

sound is not coming but picture is ok in philips 21 RF vardan tv

The problem can be caused by a bad sustain board (Ysus Zsus) , the popping sound is often caused by a capacitor blowing up.
The TV must be taken apart and tested before eventually replacing sustain boards.

have a 42 inch rca 42PA30RQ NO PICTURE OR SOUND WHAT CAN I DO MY SELF BEFORE SPENDING A LOT OF MONEY TAKING TO A REPAIR SHOP

You likely have bad solder connections around the tuner area. This model has a history of problems in that area or the tuner itself.