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I have a toshiba 42 inch rear projection TV. When you ...

Sent to Electronics Experts March 25 2008 at 11:50 AM
   

I have a toshiba 42 inch rear projection TV. When you turn it on the picture flips and the sound is mussled. After 5min it clers up and the TV is fine. what causes this the TV is 6 years old.

 

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Customer (name blocked for privacy)
Status:  Closed   Value: $15
Info Request
March 25 2008 at 12:45 PM (54 minutes and 4 seconds later)
         

Hi Customer (name blocked for privacy). Thank you for asking your question on Just Answer. The other Experts and I are working on your answer. By the way, it would help us to know:

-Could you explain your situation a little more?

What is the model number of the TV?

What have you tried to correct the problem?

Do you wish to repair this yourself, if so and if needed, what type of electronic training do you have?

What type of electronic test equipment do you own?


Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.

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Edward -- Technician -- 100% Positive Feedback on 951 Electronics Accepts
Electronics Technician for 40+ years. Electronics has been my hobby for 50+ years.
Reply
March 25 2008 at 5:48 PM (5 hours and 3 minutes and 58 seconds later)
         
model number 42H81 I have tryed to auto focus I do not want to fix it myself i have a repair person comming. I just want to have an idea of what it could be.When I first turn the Tv on the picture goes up and down and sometimes side ways. The sound is broken up as the TV warms up it gets better and betterafter about five min the picture and sound are perdect.
Customer (name blocked for privacy)
Answer
March 25 2008 at 5:56 PM (7 minutes and 23 seconds later)
         
ACCEPTEDCheck Mark

Heat is the number one enemy of electronics and these sets operate hot. Since these sets are assembled using the wave soldering process they are known for having cold solder connections. This model of TV has over 3,000 parts which includes millions of transistors inside the integrated circuits. Over time the capacitors will change value, leak and become defective. Resistors will change value and burn. This will cause other components to become defective. This can have a domino effect and cause other parts to fail. Replacing one defective part may make the TV operate for a short time but the part will fail again since if the parts that caused the failure to begin with are not replaced. For a proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment and the skills to use the test equipment. It is very likely that a capacitors is going bad or a cold solder connection is making connection once the TV warms up. The problem is like;y to be in the vertical section if the picture is flipping horizontally. Most repair projection TV sets will cost in the range of $250 or more to have repaired. This can vary depending on what is found to be defective.

Should you require further clarification, never hesitate to ask. It would be my pleasure to clarify my answer to your question. If after reviewing the above information, you have additional questions, I will be glad to answer them. My goal is your 100% satisfaction with all questions I answer.

Please click the green ACCEPT icon if you feel I have given a complete answer, and you are satisfied with my answer. Positive feedback and bonuses are always greatly appreciated!

Regards,

Edward

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Edited by Edward on March 25 2008 at 5:57 PM

Please click "ACCEPT" if I answered your question to your satisfaction. If you need additional information, ask before accepting this answer. I will be glad to answer any and all questions you may have on this subject.
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Edward -- Technician -- 100% Positive Feedback on 951 Electronics Accepts
Electronics Technician for 40+ years. Electronics has been my hobby for 50+ years.
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