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Louie
Louie, Technician
Category: TV
Satisfied Customers: 2557
Experience:  25+ yrs. experience in the field and 5+ yrs. online, down to component level.
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I have a Samsung PS63C7000YF, with no Va voltage and 15v on

Customer Question

I have a Samsung PS63C7000YF, with no Va voltage and 15v on the Vs. The screen does not work but the sound works. Also the led on logic board is not flashing. Any ideas?
Submitted: 1 year ago.
Category: TV
Expert:  TV Tech1 replied 1 year ago.
Unplug the boards on the left and right sides from the power supply board and see if the Logic board flashes once a second. Usually that light is supposed to do that, but the power supply and X or Y main boards may be sending a shutdown command to the logic board. Removing power may get that light to start flashing IMPORTANT!<a href="http://imgur.com/ZmTAPr8"><img src="http://i.imgur.com/ZmTAPr8.jpg" title="source: imgur.com" /></a> <a href="http://imgur.com/ZmTAPr8"><img src="http://i.imgur.com/ZmTAPr8.jpg" title="source: imgur.com" /></a>
Customer: replied 1 year ago.
I have removed power cable and ribbon cables, together and seperatly to X and Y boards and still the same, voltages do not change even for a split second at the start. I tried disconnecting logic board and the TV would not fire up at all. As in no sound or clicks.
Expert:  TV Tech1 replied 1 year ago.
Yeah the Logic and Main board require power and communication at all times. If not, there's no communication to the X and Y main, which is NOT a necessity. What we're testing is the POWER board, seeing if Vs comes alive -That tells us the power supply did not die on us. THEN we check the Vs pins on the X and Ymains for shorts next. Also we want that logic board blinking.So...right now it sounds like your meter isn't reading ANY dc voltage on the power supply board, right? You should have that with the main and logic board connected, you should see the logic board blink and you should hear any power relay click on and off.If it doesn't...we need to check the main board's PS-ON line and the VS-on lines -- see picture. <a href="http://imgur.com/dMjAI7L"><img src="http://i.imgur.com/dMjAI7L.jpg" title="source: imgur.com" /></a>
Customer: replied 1 year ago.
Ok will check and get back to you
Expert:  TV Tech1 replied 1 year ago.
OK I'll wait for your response back