samsung ue48h6400ak no pic but has sound.

[froggy]

I have just been given a Samsung ue48h6400ak with no picture or Back lights but does have sound,
When I disconnect the no1 ribbon to the tcon but leave 2 & 3 (see photo) the backlights come on,
I then reconnected no1 & disconnect no2 & back lights stay on & I get two blue LED's light on tcon, The exact same thing happens when i disconnect no3 & reconnect no2, The remote control is working fine as the standby light flickers when pushing buttons,
Now i do know that these display panels are notorious for being far from reliable but just thought I would post this in the hope that the symptoms i have may point to something else such as the tcon board itself perhaps?,,,,

MANY THANKS

[froggy]

Re: samsung ue48h6400ak no pic but has sound.

Has anyone got any thoughts on this or has the mere mention of yet another Samsung TV panel with issues got folks head butting their work bench in frustration? .

[dick_barton]

Re: samsung ue48h6400ak no pic but has sound.

What happens to the the Tcon voltage as measured on the white ceramic fuse when all the connections are made and you lose the backlights.

[froggy]

Re: samsung ue48h6400ak no pic but has sound.

What happens to the the Tcon voltage as measured on the white ceramic fuse when all the connections are made and you lose the backlights.

I am getting 12V at the Tcon fuse.

[ReeceyBurger123]

Re: samsung ue48h6400ak no pic but has sound.

Could be short on the panel tab driver probably ceramic cap.

[R_J]

Re: samsung ue48h6400ak no pic but has sound.

If this has the T-con at the bottom of the screen (which I believe it does) I would bet $1.00 that someone cleaned the screen, cleaner ran down and the board attached to the lcd panel is damaged.

[froggy]

Re: samsung ue48h6400ak no pic but has sound.

If this has the T-con at the bottom of the screen (which I believe it does) I would bet $1.00 that someone cleaned the screen, cleaner ran down and the board attached to the lcd panel is damaged.

It's funny you should say that as I did notice that the screen shows smears from where the screen has been wiped with something rather wet, I will try & get a look at those boards (one for each ribbon) tomorrow if i can lift them out far enough & see if there is any obvious signs of liquid damage.

[tn245]

Re: samsung ue48h6400ak no pic but has sound.

I've had this one with this TV. As Reecey suggested it turned out to be a shorted ceramic cap on the tab driver.

[Davi.p]

Re: samsung ue48h6400ak no pic but has sound.

Post pictures of back and front of psu so we can see how backlihgts are supplied, if them are from a 12v, the same that uses the tcon, so probably a short on the tcon draw too much current for that supply, but is strange that fuse on board doesn't fuse, i have doubt that b.light never came off, if is the case, is unuseful to post pictures.. it's probably only a black screen and you have maybe a faulty tcon, you don't tell what you see on screen with only a flat 2 o 3 disconnected...

[Lukeg]

Re: samsung ue48h6400ak no pic but has sound.

Which tab driver capacitor is shorted?

[Lukeg]

Re: samsung ue48h6400ak no pic but has sound.

I've had this one with this TV. As Reecey suggested it turned out to be a shorted ceramic cap on the tab driver.

[Lukeg]

Re: samsung ue48h6400ak no pic but has sound.

Tn245 which capacitor is shorted please buddy bashing my head against the wall at the moment