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Samsung lnr408dx/xaa ... Tv powers up, screen backlight is

Customer Question
on but no video or...
Samsung lnr408dx/xaa ... Tv powers up, screen backlight is on but no video or on-screen display, there is sound.
Submitted: 8 years ago.Category: TV
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Answered in 24 minutes by:
1/28/2009
TV Technician: Edward, Technician replied 8 years ago
Edward
Edward, Technician
Category: TV
Satisfied Customers: 7,966
Experience: 40+ years in TV repair. Electronics Technician for 40+ years. 50+ as a hobby.
Verified

HiCustomer Thank you for asking your question on JustAnswer. 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? The model number will be displayed on a tag on the back of the TV near where the power cord is attached.

How long have you owned the TV?

What have you tried to correct the problem?

 

Can you view the menu of the TV?



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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Customer reply replied 8 years ago
Samsung LNR408DX/XAA
3 years old

So far I just removed covers and inspected for obvious hardware failure.

No, the menu is not visable.

... I was watching TV and went to cook breakfast, when I returned there was no image on-screen. I tried to change sources but still no image and no on-screen menu. I tried to unplug power for 5 min but with no effect.
TV Technician: Edward, Technician replied 8 years ago
You might wish to unplug the TV for an hour or more. If this power reset does not allow the TV to turn on component failure is indicated. These sets are assembled using the wave soldering process they are known for having cold solder connections. The safety circuitry shuts the TV set down or will keep it from turning on when it detects a problem. This model of TV has over 2,000 parts, which includes millions of transistors inside the integrated circuits. The capacitors will change value, leak and become defective. Resistors will change value and burn. Diodes and IC can go bad. This may 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 if the parts that caused the failure to begin with are not replaced. The only way to know for sure which parts that are no longer within factory specs and for a proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment specifically designed for TV service and the skills to use the test equipment. I wish I could tell you there was a quick fix or button to push that would fix the TV but that is not the case or the solution needed to get the TV operating correctly.

If you wish to repair it yourself what type of electronic training do you have?

What type of TV test equipment do you own?

Do you own and know how to operate an oscilloscope?

If you decide this is not something that you can do would you like an idea of what the cost to repair the TV will be?

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 can leave positive feedback. Positive feedback and bonuses are always greatly appreciated!

Regards,

Edward

As always when using Just Answer your accept is required for me to be paid. By accepting you are agreeing that I have satisfactorily answered your questions. If you do not accept, your deposit if applicable, will remain in your Just Answer's account until you request otherwise.

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Edward
Edward, Technician
Category: TV
Satisfied Customers: 7,966
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Experience: 40+ years in TV repair. Electronics Technician for 40+ years. 50+ as a hobby.

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