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Plasma tv screen does not work, sound does after power failure

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I would suspect it has blown a fuse, more than likely on the Y-sustain board due to the power failure causing a surge. Possibly just replcing the fuse may rectify things but if it were to blow straight then the power failure has caused some component damage & would need to be investigated further by a repair engineer.

Posted on Jun 30, 2009

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No sound or picture but lights come on sony wega plasma


Typical failure for all plasma tv's is a blown Y-sustain board. Another high failure for all tv's is dried out bulging capacitors in any of the power boards. You likely have one of these problems.

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It can be the power supply, Z-sustain boards failures due to bad caps, blown fuses. Yopu should alos check the Y-SUSTAIN board also.

You can see what the boards look like here:
http://www.shopjimmy.com/catalogsearch/result/?q=Philips+50PF9631D+

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

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It sounds like the video output isn't
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failure 1 thing you could try is connecting
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through.This is a problem that requires technical
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Sounds like main board failure and or power board failure. You need to contact manufacturer and describe problem for tech support. Some of the parts in Samsung TVs have lifetime warranties. Change out of two board is about an hour job and service call is usually comped. Hope this helps. J

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Have a Sanyo Plasma TV DP50747 and both picture and sound all of a suden went. I turned it on from the remote and the green power light goes on, but no picture or sound and the power light goes off again...


Hello,

Yep. The power supply in Sanyo Plasmas are generally prone to failures. It could be a failure in the panel not priming, but I doubt it. Turn the lights off in the room, then try to turn it on. If you see the screen faintly flash, the panel is priming, but it is not coming on. If the screen is lit, but is still "black," then it is a control or digital board. If it is totally black with no light at all, then it doesn't entirely rule out the first two, but makes a power supply failure more likely.

They usually have a lot of heat damage to them. If you have tried unplugging it for 15 minutes, then plugging it back in and it still doesn't work, the it is most likely a secondary in the power supply.

I hope this helps you...

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Power supply failure-checked Pioneer's website, there is a recall on the power supply.

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power no video, is an indication of a bad panel. It usually requires changing the power board, and the panel. this supplies all boards to receive the proper voltage to correspond with each other to make the TV work again including the LCD panel. also the revision code and firmware needs to be current, to prevent future programming failures.

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