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Samsung Plasma PN51D6500DF- no standby light, will not power on. . . heartbeat LED on back panel IS on though! Need advice on Vs and Va voltage testing, please.

I jumped the wires from the power unit to induce a display test with no success. I am getting standby power from the Power Unit. Vs and Va are not testing to the right numbers, but I am wondering if that is because the plasma display is not on. I am wondering if this is definitely the Power Board needing to be replaced, or might it be the Main or Logic board too. No capacitors appear to be damaged.

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If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/

Posted on Jan 02, 2017

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How to Calibrate your plasma panel for less heat dissipation


First you need to take the back off the tv....i know...lol..lots of screws.
try to pile all screws by size.
Now that you have the back off, in the power supply of the unit find
the Vs and Va voltage lines...connect a voltmeter to the Vs line.
on the panel there's a sticker with the factory voltage settings...try to bring
the Vs 10 volts less than what the factory adjusted it to. do the same for the Va voltage line.
The reason for that is that it will deliver less heat on the panel, and it'll
extend the life of your plasma tv.
Thats because what brakes them down is heat.

on Jan 22, 2010 | Televison & Video

1 Answer

Samsung plasma tv no vs or va voltage


The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Sep 26, 2016 | Samsung Televison & Video

1 Answer

42 inch samsung plasma comes on then picture go's out turn off and back on the picture comes back on and go back out after 30 min


It sounds that the Va / Vs voltages to panel has gone out of its range. Check these voltages. If you wish to get more details about these voltage settings, check this link.

Feb 05, 2013 | LG RU-42PX10 42 in. HD-Ready Plasma...

1 Answer

My power will not turn off and the blue light stays on. I get no picture or sound. PLEASE HELP!!!


First of all you have to check the Va - 60V and Vs - 80V voltages at the power supply point. If any one of the voltage is missinig there are two possiblities for that. One is the power supply itself and the second one is the sacn drive modules for X and Y. If the scan drive modules are faulty then the or short then the Va Ans Vs voltage from the power supply will drops.you have to measure using a multimeter is there is any short circuit in its power supply in put point. When the voltages from Va and Vs point are missing then this will indicated by the blinking of power light. To rectify the problem you need a good knowledge in electronics. Aslo need the necessary equipments for measuring the voltage at different points

Nov 10, 2011 | Hitachi P50T501 50 in. Plasma HDTV

1 Answer

Hitachi Plasma model P50V701 - press the POWER button, display lights go from standby-red, to Power-blue to blinking blue and the sound and picture appear for about 2 seconds. have tried unplugging and...


(Green Power LED will go Green the Go Off) Brief rise then collapse of the Vs and Va voltages.

This indicates a "Load" on the line.

Pull the CN-64 connector feeding Vs/Va voltages to the X-SUS.

Take an ohmage reading from the Va and Vs lines on each PWB.

This means you have to read the Connector on the Power Supply and the pulled connector going to the X-SUS.

See if there is a low value. Low value indicates a defective PWB.

Normal reading should be infinity. (Using the diode mode on the DV/Voltmeter, there will be a brief charge

time, then infinity.) In other words, it may appear as a low ohm reading, but should rise to infinity or open.

(Also not, if there is a charge on the line, the meter may show a low. You must Pull the CN68 connector and take

a reading again).

The line should now be infinity when reading the Power supply pins for Va and Vs and when reading the

connector going to the X-SUS PWB.)
If a Low is see on the connector, pull the CN32 Connector. (Bottom right hand plug on the Y-SUS PWB)

Jan 12, 2011 | Hitachi P50V701 TV

1 Answer

Does not power up or start


Take the back off and check for a couple of bulged caps that might need to be replace in the power supply. You can and also check and see if the VA and Vs voltages are correct coming out of the power supply. There will be a label on the inside panel telling you what the VS and VA voltages should read. repair, or replace power supply.

Nov 22, 2010 | LG 42PG60 42 in. HD-Ready Plasma TV

1 Answer

LG 42 Plasma try's to turn on but just goes back into "stanby" ?


Check to see if you get Va and Vs voltages from the power supply. There should be some wires running to the y-sus. A couple of those wires will be labeled va and vs. Are they present? There will be a sticker stuck to the panel somewhere telling you what they should be.

Mar 26, 2010 | LG 42PC3D 42 in. Plasma Television

1 Answer

Just clicks


There are many reasons to cause the TV clicks.
Power supply board failure
Y board and buffers are defective
Mainboard is defective.
If you want DIY, open the back cover then check those fuses on the power supply board - this board has the power plug comes in. Then check Va, Vs in comparision with label sticked on the back panel. If Va, Vs does not have there, replace the power supply. If yes, you may unplug the cable which is connected to Y board and buffers-power on and see Va, Vs has any change. If yes, the Y board and buffers need replaced.

Aug 12, 2009 | Samsung HP-R4252 42 in. Plasma HDTV

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