Question about Panasonic PT-51HX40 51" Rear Projection Television
I was watching a movie when the screen began to fluctuate and got smaller and smaller. Eventually the screen when off. The power indicator still turns on when I turn on the TV.. however there is no picture and no sound.
SOURCE: colors are way off
The problem that you are describing sounds like you have bad convergence IC’s. These are usually on large heat sinks on the circuit boards and they will have numbers like STK-XXX on them. My suggestion is to call a local servicer to have the set checked out. If you want to repair the set yourself, let me know and I can try to locate the IC’s for you.
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Posted on May 18, 2009
SOURCE: Panasonic PT-51HX41 51 inch
If the power led blinks its an error code such as 3 blinks means convergence failure which is the most common error for your model.Let me know the error code and I will assist you with what you need to do.
Posted on May 28, 2009
SOURCE: Have a 51
Your symptom sounds like a damaged convergence IC.
If your colors do not line up, I am guessing that is what you mean by a double image.
While it is not a very hard repair, this repair can be a bit tricky. If you have a 45W soldering iron, solder, solder wick, and heat sink compound you can repair it yourself.
When you remove the old IC's, please be sure to remove all of the old heat sink compound, as it can act as an insulation for the new IC's and cause them to overheat. I usually clean the heat sinks with alcohol and a small rag.
The power light may start blinking indicate a short in the power supply, this will happen soon if you do not repair the set before the STK's short out.
There are two and large IC’s that control the convergence in a big screen set. Some of the newer sets only have one. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).
Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.
If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.
I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.
You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.
I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.
Posted on Oct 12, 2009
Check the power light for blink code--usually if this model shuts down the power light will blink in a sequence--3 blinks a pause and 3 blinks is short protection--usually means a convergence circuit problem.
Let me know what you find--I am here to help.
if this helped you rate this solution as I do this here for free.
Posted on Dec 17, 2009
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