My Samsung model #UN55H6203AFXZA has sound but no picture. What can I do?

1st thing I would look for is bulging filter caps. replace any that are.
this video may help also
https://www.youtube.com/watch?v=q8W8m_Xa-Lo

It has a reset button on the lower back right hand corner; push that button.

The back lit LED's go faulty frequently also if DC - DC inverters are used fpr driving the LED's they may be faulty
Do not attempt to repair the inverter , change the module .

I wonder if that TV has headphone or audio out jack? Sometimes when that jack fails it is getting shorted and TV automatically turns off internal speakers to send sound to headphones

Does it have an image when a bright light is shined behind the screen?

Hi Anonymous,
Generally the parts work if the connectors are same. You may have to do some corrections in the service manu.

have you got a black screen???
if so it could be what they call the invertor that is behing the screen at the bottom.
may need replacing.
are you able to put a vga cable from your laptop to a monitor?
if you can see a pic on the monitor then yes it could be the invertor that's gone.you will have to get a new one.

You're a technician work to earn I assume. Do understand; this is a forum to help one who knows a little; to make their sets right. Not a help you like people to turn revenue out of it. Understand? Do not know nothing; yet runs a service shop to cheat others!!!!! https://electronicshelponline.blogspot.com/