Question about Samsung 50 in. Plasma TV

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Samsung 50' Plasma has No Picture

Samsung 50' Plasma PS50C96HDX has no picture only sound. I have tested the main power board etc...
When testing the y-sustain the fuse is not blown and the low power green LED is on and if I can get power up until here it must be the y-sus board or the screen itself? Please let me know if you think it could be anything else?
Thanks - Matt

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: Part # for a Y Sustain Board Cable Ribbon

why are you replacing it? what went wrong? mine just stopped lst nite and jsut ties to turn on. email res116@comcast.net

Posted on Jun 18, 2008

SOURCE: Y Sustain Board Replacement

I found the Z Sustain / Y Sustain (P/N: 6870QYC004A 6870QYC004B 6870QYC004C 6871QYH039A 6871QYH039B 6871QYH039C) here for CHEAP:
http://www.discount-merchant.com/Y-SUSTAIN-PN-6870QYC004A-6870QYC004B-6870QYC004C-p/vizio-sku9501.htm


I found the X Sustain (P/N: 6870QZC004A, 6871QZH044A, 6870QZC004B, 6871QZH044B, 6870QZC004C, 6871QZH044C, 6870QZC104A, 6870QZC104B, 6870QZC104C) here: http://www.discount-merchant.com/We-provide-factory-original-parts-worldwide-p/vizio-sku9502.htm

These are also compatible with the following brands according to Discount-Merchant:
ZENITH, HP, VIZIO, MAXENT, LG, ZENITH, SONY, HITACHI

Posted on Jan 14, 2009

  • 1 Answer

SOURCE: Magnavox 50" plasma Won't Power on/Shut's off/Blinking red LED

sherrie
michigan

I followed the solution e-mailed to me. My 50 in. phillips magnovox plasma had no sound or picture. I removed the back panel of the tv ( 55 screws) and removed the circuit board in the center of the tv. There are about 5 or 6 wire connections that you have to unplug, but they are all different in size so it's ot a problem when reconnecting. Take the circuit board to a tv repair shop. There are 2 capacitators side by side at the bottom center that were bulgeing. 3300ua 10 volt. I had them replaced by the repair shop while I waited. They had (1 ) 25 volt and (1) 16 volt available. The voltages do not have to match each other. The higher voltage is better. I put the tv back together and HURRAY!!! it works. I have been searching for a solution since last summer, Thanks to fixya.com my problem has been solved. It only cost me $35.00 total.

I thought the tv was going to the curb, thank god I didn't toss it. I hope this solutions works for the endless number of people who have posted this same prolem. GOOD LUCK!!!

Posted on Feb 12, 2009

  • 12 Answers

SOURCE: No picture but have sound on Plasma 50"

Call Associated Electronics @ 414.281.1000 and tell them what you need. They are very good, and extremely helpful.

Posted on Mar 23, 2009

  • 718 Answers

SOURCE: how hard it is to replace by yourself main board Samsung LN-T4065

You need to do some more diagnosing of the problem. If you get sound and change channels take a bright flashlight and place it again the screen. Look for an image around the edge of the flashlight.
If you see an image that means the LCD controller board (TCON) is probably good.

The problem is probably one of three causes;
1) Inverter board is bad
2) CCFT (cold cathode fluorescent light) are bad.
3) Power to the inverter board is bad. You can also check the connectors.

Posted on Mar 30, 2009

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Samsung 50 Plasma Parts ' eBay

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eBayFind great deals on eBay for Samsung 50 Plasma Parts in TV Boards, Parts and ...Samsung 50" PN50C430 LJ92-01728A Plasma Y-Main YSUS Board Unit Motherboard.... Part Number: LJ92-01705C (Partial PBA number (705C) can be found on a ...Samsung HP-R5072 50" Plasma HDTV Main Board BN41-00632A ...

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It is possible for the TV to switch on or off but no picture or sound. This means the input board or tv tuner is faulty in which case you need a good tv repair technician

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Did it work with the Y-sustain board replaced? Likely if it did not work then there is an issue with the capacitors on the Y-sustain board and the power board. Check these caps for failure and replace them with the exact type. Likely the caps are blown and cause voltage loss in one or both boards.

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MY SAMSUNG PLASMA HAS NO SOUND BUT HAS PICTURE BUT MAKES THE SOUND WHEN SWITCHED ON


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Hi.

As such boards are cheap and fail quite easily (both the two sustain and the buffers) Philips service manuals are more oriented at board swapping then at proper testing. In this particular case the buffer boards fail very easily because of a bad soldering to IC. The short will regularly blow the main sustain board.

To start when a main sustain (e.g. Ysus) is fried the TV will go in protect mode with the led flashing in standby. One test is done disconnecting the Sus board (with power off) and restarting the TV. If TV does not go in protect, then the sustain board was good.

If there is no protection:

The first thing to check on a main sustain board is the fuse. If the fuse has blown the IC is probably fried.I believe fuse is F5004. Check for swollen capacitors that may have blown. Test the FET. That is the core of the board as it is the power amplifier.


Here the service manual:PHILIPS_SM_15540.pdf - Right Click "Save Target As"

Here a more useful service manual. Check and follow troubleshooting diagrams in manual.

Here some troubleshooting from users.

Note:if buffer board was shorted, then the main sustain board is usually faulty.

Regards.

Ginko

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Hello,

Problem is in either power supply or the Y-Sustain board.

The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

Good luck in solving the problem also be careful in handling the set because it contain high voltage....

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Problem is in either power supply or - my bet - the Y-Sustain board.

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Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

hope that help out......

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