I have a PS50Q97HDX/XEE before the problem was no picture only sound.I changes the parts MAIN SCAN LOWER (parts BN96-06521A) MAIN SCAN UPPER (parts BN96-06520A) PDF Main Board (parts BN96-06519A). After I change the parts I have picture,but on the rigth side of the screen I have black screen.25 cm from the top and to bottom and after 15 minutes the picture went a littlw bit snowy. What more do I need to change? Best regards Jan R Andersen (NORWAY)

SOURCE: picture is not coming on samsung spn4235

Remove the Power Supply cable to Y Main board and check the Vs voltage in Power Supply board.
1. Vs voltage is OK, replace the Logic board or Y Main board.
2. Vs voltage is NG, replace the Power Supply board.

SOURCE: NO VIDEO

I have a Samsung 50" plasma, that has been blacking out over the last 6 months. A 9/2005 set. Now its practically unwatchable as it happens 3 times in an hour. Its not heat related - I have a high volume 9" fan activated on TV power on. Turning the set offf/on usually makes it come back for a now short while. Considering to go put it in the back of my pickup and park it in front of Best Buy and discourage Samsung purchases. This is the 2nd Samsung TV I've purchased (the other a 32" tube) I gave to my folks a couple years ago and its gone bad as well. Samsung product may look good, but their video engineers are not.

SOURCE: screen went black/blank can hear sound no picture,

Your inverter circuits and/or power board need servicing.....

Either three fault scenarios are happening:

1. the inverter circuits are not producing AC ripple too the CCFL lamps that illuminate the LCD glass panel.

2. the power supply board is not feeding 24vdc - 12vdc sustain voltage too the inverter circuits. Meaning, no dc high voltage output from the power board.

3. The timing control circuit (LCD Board) has shorted switching devices or on-board memory has failed....which causes data/dc loss at the input which results in the inverters canceling load power (lamps). The sync data between inverter and LCD Board are absent. This will result in a 'NO LIGHT' condition on the LCD display.

Number 3 is a rare case, its usually #1 the inverters need servicing.....

Dave Naylor

• 834 Answers
• Posted on Dec 04, 2009

SOURCE: TV screen is black. Was working went black and now nothing.

you have a bad capacitor in the power board you will need a tech to change it the can shaped device will be puffed up on the top and the value is written on the side

SOURCE: after one hour or more, the lower part of the

THIS LOOKS LIKE A LOWER Y BUFFER

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