SAMSUNG PCL5415RX-XAA - Audio OK, but screen is dark, has no images.
I have a SAMSUNG PCL5415RX-XAA since 2002, it has been a great TV but now is showing some flaws.
First the image was all green and then it went blackout, several trials later to turn it on again I can heard the relay clicking, but the TV powered off right away, then I thought that something shorted.
After reading some of the threads on this site, looks like it could be that any of the boards are indeed shorted; so I opened the TV set looking for signs of fluid leaking, but I didn't find any, then I just blew the dust off and tried again.
Now the TV turns on and stays on, and it has audio, but the screen still dark, it has no images.
I'm troubleshooting following the flow charts on the service manual page 5-3, titled "No Raster (Sound OK)", I pretty much understand all of the steps except for the first one, "Check Heater"; on the wiring diagrams I have seen the a couple of lines marked as "Heater", but it is just a line, it doesn't relates to any electronic component.
What is the "Heater"? Is this "Heater" the same as the heat sink?
If so, what should I check on the heater (heat sink)?
Any recommendations to help find the delinquent components?
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Jun 11, 2012 - Uploaded by ShopJimmy.com
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First trouble shooting steps is to try a different source, or at least a different cable. A bad HDMI cable can allow sound but not image. Also look closely at the screen. If you can see a dark image, it would indicate that the lighting system has failed. Check this video for some tips. Samsung Plasma TV Repair How to Repair and Replace Main Board
Yes, however I would be surprised if changing the two Ics will repair the set, as that chassis should always have the sub-deflection board replaced since most of the resistors will be stressed. Thats why samsung changed the later chassis's by removing the convergence circuits from the deflection board as its almost 98% certain that the deflection board will need replacement when the ICs fail with those chassis designs unless every component in the convergence circuit is replaced which will cost more than the deflection boards do. But you may get lucky but if the ICs dont cure the problem you will need a new deflection board
I'll take a look if you want to forward them to me:
This convergence board problem seems to be very common and if they are not too model specific (firmware embedded) there may be service companies repairing them.
I don't; haven't done a whole lot of service for years partially due to the difficulty of trying to pry stuff out of the hands (or shelves) of Asia.