Question about Samsung SPK4215 42 in. Plasma Television

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No picture Television powers up but has no picture only some faint horizontal lines across the screen. Does anyone know what the LEDs on PCB board mean. Are they diagnostics LEDs and what are they telling me?

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Sounds like the inverter board is bad, some tv's have the inverter as part of the power supply, you will have to open it up to find out

Posted on Apr 30, 2007

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Six year old 53UDX10B - Faint Horizontal Lines in Picture


This is a pretty common fault here Mike. I cannot remember the capacitor number, but it is right off of the flyback transformer and supplies the screen voltage to the picture tube driver transistors. You will need to get a scematic and trace out and check the flyback secondary capacitors for leakage, I am sure you will have more then on or two capacitors that need to be replaced. One more thing with this TV set. Look right under where the picture tubes are on the printed circuit boards, for an indication of fluid leakage or an oily substance. If you see any evidence of this, turn off the TV set and unplug it and call out a tech to try and clean off these boards before any further damage happens. Good Luck

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Our three year ol Samsung TV has dark horizontal lines across the top of bottom of the screen. It is getting worse


Welcome to fixYa!

When you see lines like these across your LCD, it indicates a problem with your monitor's electrolytic capacitors.A faulty filter capacitor in the power supply board (SMPS board) can cause horizontal lines across your monitor screen.Horizontal screen lines are one of the most visible problems I see in LCD monitors & TV's that are 3-7 years old. It can happen as much from heat, humidity & less-than-ideal operating conditions, as it can from fluctuating current supply or manufacturing defects.

The way to repair horizontal screen lines is by removing the capacitors from the printed circuit board (PCB) and testing them with a LCR meter.

If it shows zero, there's your confirmation that the specific capacitor needs to be replaced.

now if you can replace them your welcome but i wont suggest that , cause you may break it more....!

any ways do comment if it helped you in any manner!

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1 Answer

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very possible the YSUS board is going bad .If YSUS is going bad .I would also replace XSUS board since they are same age..Also whenYSUS is replaced make sure you make pot ajdustments as old YSUS and also with XSUS board

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1 Answer

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Here's a link to order the original the JVC upper Y-buffer board and lower Y-buffer board for this model from a major parts distributor if needed:


JVC "PD-42DX6" Replacement Part Upper Y - Buffer Board (LJ41-02760A)

JVC "PD-42DX6" Replacement Part Lower Y - Buffer Board (LJ41-02761A)

Based on the symptoms: It is possible that the Y-buffers are faulty, which may require the replacement of the Y-sus board as well. You may want to get a local technician to diagnose the unit and provide a second opinion.

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1 Answer

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if this line is in the picture, that is possible burn in screen. if you have a black bar at the top or faint white lines that come down from top this is caused by defective filters in vertical circuit or bad vertical output. mch

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HORIZONTAL FAILURE AND LINE DOWN THE SCREEN. REPLACE T5A1 LOCATED ON PCC-3-PCB. PT#349P145030(FOR CS-35401,CK-35402 ONLY) Hope this helps! Troy

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1 Answer

Faint horizontal lines in picture


This is usually caused by a problem in the Horizontal Output section, around the Horizontal Output transformer usually a capacitor or diode going or gone faulty... the line you see are the Horizontal "Retrace" lines that are useually "Hidden" when the circuit is OK..

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