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CRT Board Is that expensive to replace?

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My TV picture disappears and the audio disappears for a couple of minutes then it comes back.
The green power light stays on the whole time. The lamp light does not turn red.
What could be the problem?

Posted on Oct 18, 2008

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A crt board can cost from $25 to $40, the problem is that crt board should be tested before replacement, even if it is the most likely cause, there is always possibility that there is also something else (tube, main pcb etc.)

Posted on Jul 08, 2008

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Picture shows only red on the screen

We had a problem with our Panasonic projection TV once that showed this symptom. We had to have the red CRT (cathode ray tube) replaced in our case -- it was under warranty at the time, but was a fairly expensive part. It could also be a bad board driving this CRT or a loose connection between the two. If you have it under warranty (I'm guessing not) have a repairman diagnose, otherwise, it may be time to replace with a nice LED flatscreen...

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I have a ws-55819 that leaked fluid onto the green signal/control board. How do I replace this board and do I need to replace the picture tube?


If your green crt is leaking you will need to replace it. This is fairly expensive and if the unit is older you should really replace all the crts or you may have a problem trying to balance the color.

CRT projection units are run very hard and need a coolant in front of the phosphors to keep the tube from overheating and imploding. There is about 1 inch of a special optical coolant sandwiched between the phosphor panel and the outer panel. It is sealed at the factory and never needs changed or added to unless, as you have, experience a leak. I doubt that the leak can be fixed successfully. That means replacement is your only option.

If you want to proceed I have a tip at which will walk you through it and also give you the best place to get the part at the best price.

Thanks for using FixYa and for the great rating.


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My screen has no red color. I assume the red color gun has gone bad. Is this it? How expensive to fix? Is there a do it yourself cheap fix?

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Flashes red then shuts off

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Nov 24, 2009 | Projection Televisions

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50sbx70b made sizzling noise then quit

Sizzle cound be crt arching or hv transformer. look for burn marks on transformer on deflection board. unplug set and remove crt boards from the crts and see if set will turn on. if replace arching crt. expensive. not to be attempted by amature.

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Power light on

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My Sharp Aquos has lost it's picture brilliance on all channels.

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It probably is see if you can align the convergence manually or auto if available, you can order just the convergence ic's or the convergence amp board, whichever you prefer. check pricing and availability. also check Blue crt for faded picture, usually dirty crt fluid, makes picture dark and discoloured. If it is you may need to replace the blue crt also. this gets a little expensive, again check pricing hope this gets you started RFT

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1 Answer

Sony kp57hw40 52 in. televison

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