Hp-t5064

[zukdj]

Here goes, I have a Samsung HPT5064 Plasma, I turn it on and has sound, no video. I have tested out both the X & Y as well as the buffers, replaced the T-CON logic board because I was told that was the problem (NOT). Anyhow, I plugged in RCA jacks to a DVD player and the inputs on the back of the TV, I have sound until I unplug the video (Yellow) from the TV - wtf: I was always under the impression only video flowed through yellow and (Red) was right and (White) was left audio. Anybody have a 50" Sammy with the sound-no video problem?

SEE ATTACHED

Please help, I need my TV back up and running.

[zukdj]

Re: Hp-t5064

I forgot to mention, all heat sinks on power supply, Y & X heat up evenly as I was told they should. I see no buldged caps anywhere. As a just for kicks test I swapped out the buffers and the Y main, same issue...I'm perplexed, could the main board in the picture above be a problem? The screen is black, not even a flicker of life but the sound is great.

[zukdj]

Re: Hp-t5064

Any takers?

[awyatt2]

Re: Hp-t5064

have you checked to see if the video is there with a flashlight?if the lights are not there then it could be inverter, or power supply, have you checked any voltages. have you checked any fuses? you have not given enough info to decipher your problem.

[tom66]

Re: Hp-t5064

I know that in the very least Samsung LCD TVs won't output sound without video. In fact most of my TVs don't output sound without video.

[RON_CET]

Re: Hp-t5064

try removing the lvds cable from the main, then at the control board some models use a 4 pin or 6 pin test connector.If your model use the 4 pin jump pins 3/4 together or if has the 6 pin connector jump 5/6 together. Power set on you should see the test generated patterns scroll on screen from the control board if you do more likely bad main board.

[electronicsurplus]

Re: Hp-t5064

Zukdj,
1st, this is a Plasma Television and shining a flashlight will not do much good, unless it is a super strong flashlight that can also ignite the plasma gas which gives this screen light

1st check the Y-Sustain to make sure that you have both VS and VA voltages going to the Y-Sustain, they should be approx 60V DC VA and 200V VS, then check whether the fuses are good for both(Some models also have small SMD (Surface mounted fuses))
and, some others also have small surface mounted fuses cluse to the output side(Buffer Side), make sure if these are good or not. If they are blown then you can try replacing it or jumping them with a 1 - 10 ohm resistor (The resistor will also act as a fuse in case there is a direct short to avoid blowing other components)

If the fuses are good then you can try disconnecting the Lower buffer and try, if you have a picture then obviously the lower buffer is faulty. and, you can also try the upper buffer, with the lower installed. in either case you shoulod have 1/2 picture, either top or bottom depending on which buffer you disconnect.

You can test the buffers using this guide
http://blog.coppelltvrepair.com/2010...er-boards.html
which was written by coppell tv in texas. a great guide with pictures

Jon

[zukdj]

Re: Hp-t5064

Ronbo, I am a newbie so I can only assume the lvds cable I am removing is at the top of this board, where are the test pins, on the T-CON board? Is the board behind that (smaller) what you are calling the control board?

[zukdj]

Re: Hp-t5064

One other note, I see a flashing green LED on the T-CON board near the center as well as one near the top that stays on solid green, is that an indication of a problem? The funny thing is I am not getting the protection fault issue (clicking on and off) so it is hard for me to determine what is causing the lack of any picture at all (pitch black screen, only sound). Again, I am a newbie and don't want to mess with high voltage until I have a better understanding of these TV's.

[RON_CET]

Re: Hp-t5064

The LVDS cable is the white round cable @ top of your Main board in that square connector,follow that to your T-con board,then follow my post#6 this will tell you if the control board or main is bad,Now if you still don't have any picture from following post#6
your going to need DVM and measure your VS,VA,VS_on like electronicsurplus mentions in his post#7

[zukdj]

Re: Hp-t5064

Where on the T-CON are the test connectors?

[RON_CET]

Re: Hp-t5064

After doing this test if you don't see any test patterns scroll on display then you might need to troubleshoot using methods describe in post#7 by electronicsurplus

[zukdj]

Re: Hp-t5064

No test patterns, black screen. Damn, I'm thinking maybe the Y-SUS main and buffers is bad after all. I'm not keen on testing voltage and I'm not sure where VS and VA are either. I'm a newbie learning by latching onto the professional techs. Now, if it was a computer I'd be on it like white on rice. If you can direct me I surely will take a shot at it but I need direction. The TV has sound, but the screen is black as night, not a thing.

[electronicsurplus]

Re: Hp-t5064

have you checked to see if the video is there with a flashlight?if the lights are not there then it could be inverter, or power supply, have you checked any voltages. have you checked any fuses? you have not given enough info to decipher your problem.

Inverter?? This is a Plasma. There is no inverter. do you mean the Ysus?

[electronicsurplus]

Re: Hp-t5064

Zukdj,

Look at the power supply, the large board in the center of the television. You will see 3 large connectors. One has wires going to the YSUS (the board on the left side looking at the back of the television) and, one going to the XSUS (The board on the right)

If you unplug these connectors you will see small letters Va, Vs, etc test these using a multimeter (Volt meter VOM) and, the proper voltages that are supposed to be there are printed on a label attached to the back of the screen the vs is somewhere around 200 v dc and the va around 65v dc

Let us know what readings you get and will direct you further


Electronic Surplus

[cclla]

Re: Hp-t5064

Hello,

Not sure if this problem has been solved for you but I wanted to let you know anyway, That model falls under the Samsung class action settlement involving bad power supplies. Samsung will pay to have the power supply replaced or pay you back if you have already repaired the unit due to the power issues. You may want to contact them and see if your unit qualifies.

Samsung class action information can be found here.