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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Re: No picture

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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Horizontal bar across bottom of screen.

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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TV quits working, screen goes black and red light next to power green light flashes 4 quick flashes . After a second or two of no flashing,red light repeats "code" flash. We pull the power plug at the TV,...

The Sony diagnostic routine for 4 blinks indicates it to be a vertical deflection problem.

Did you see a solid horizontal line in the center of the screen prior to it going out? If so, that is a tell tale sign for vertical problems.

basic sony reset below

The STANDBY light will flash if the television detects an issue within the television. Some of these issues can be resolved simply by following the steps below to reset the television.

  1. Turn off the television. IMPORTANT: For a projection television that uses an internal lamp, wait 5 minutes after turning off the television to allow the lamp to cool before continuing with the following steps.
  2. Unplug the television power cord from the electrical outlet.
  3. Let the television remain without power for 60 seconds.
  4. Plug the power cord back into the electrical outlet. NOTE: If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.
  5. Turn on the television.

If the issue is still unresolved after following all of the troubleshooting steps, service may be required. Please note the number of times the STANDBY light flashes and relay that information to the service center

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1 Answer

Is this a T-con board problem? (pictures in comments)

when my Vizio did that it was the mani board and cost 250.00 to have fixed .

Oct 29, 2015 | Samsung LN-R238WA 23-Inch Widescreen...

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T'Con board fault.
If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".

Jul 19, 2014 | Westinghouse Flat Panel Televisions

1 Answer

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if it does not go all the way across the screen, may be the buffer board controlling that area. you can usually visually check for burnt/overheated parts, then replace that particular buffer. could also be X or Y sustain PCB depending on whether it is vertical or horizontal.Again, you might do a visual for burnt/overheated parts on the particular PCB & replace either parts or PCB.
Lastly , may be panel....not cost effective.

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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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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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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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Bring up the menu and if the lines are not on the menu replace the small signal board that is your video prossor. If the lines are still the replace the Y main board that contrl the top half of the screen.

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