Samsung pn64e533d2f no pic sound ok

[ducatilover]

Picked up this tv from someone that didnt want it because it had stopped turning on. Only history I know is that it started failing over time. It would turn on at times and run fine but would have to hit the power button multiple times before the picture came on. Then one day it never came on but still had sound.

I opened it up and checked for bad caps and found none. Did the flashlight test and there seems to be no image. then started checking voltages and noticed that VS and VA drop shortly after start up. I disconnected the y and z boards and the same thing happens. What could I check next?

Im familiar with checking voltages and continuity just not too familiar with checking ohms, mosfets, ets.

Let me know what you think. Thanks for the help in advance.

[Shinju]

Re: Samsung pn64e533d2f no pic sound ok

Flashlight test only works on LCD/LED panels, Plasma creates its own light so if you have no screen prime you will never see a picture.

These panels are known for their shotty Y and Z boards also there is a Samsung must firmware update for all their plasma panels if you have not done so update your firmware ASAP after fixing this.

Does your TV run with just the Y board attached to the SMPS or just the Zsus?

[Nick's Tvs]

Re: Samsung pn64e533d2f no pic sound ok

You probably have a bad power supply.
Reflow the blue ceramic capacitors that are on the upper side of the board between that middle heat sink and transformer. Check for cracked solder joints all over the board as well. Now try turning on your tv and let us know what you get.
If that doesn't work then start from the beginning and isolate your power supply. Disconnect every connector form it, and short PS-ON to ground and VS-ON to 5volt line using a 1k resistor. Now plug the tv in, and check your VS and VA lines. If you don't get proper voltage, then you have a bad power supply and we can move forward on testing it on component level. 3 out of 3 of these sets with similar symptoms that I have fixed all had a cracked solder joint on that little blue ceramic cap.