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40" flatscreen tv looses its color after 15 minutes

Looses it color after 15 minutes! What would cause problem and the name of part

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  • Expert
  • 74 Answers

Try to check or ensure that there is no magnet or a speaker with a strong magnet near the tv

Posted on Feb 13, 2014

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4 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: No picture when on for approx 15 minutes

It sounds like you are saying the "video looks scrambled but the audio keeps playing OK"

Normally this is a Video Processor Problem that requires a Board to be replaced.

When the problem happens, can you see the TV menu or the TV's On Screen Display clearly.

I suggest checking to see if the problem happens with the video inputs like, Composite(yellow/red/black), component(RGB/yellow and black), HDMI and S-video. If it happens to all inputs then you need to replace a board.

Posted on May 22, 2009

  • 244 Answers

SOURCE: Problem w/brand new 42" Insignia Flatscreen TV

if it's still under warranty- get it replaced!! while you can!
shouldn't be doing this! at least until warranty runs out- you know how that goes!!
if it was quite expensive- might try for extended warranty- if not too outrageous!
good luck!

Posted on Oct 17, 2009

joeguest2
  • 2080 Answers

SOURCE: i have a samsung flatscreen

With the lights in the room turned off, does your TV screen still glow when it is turned on even though there is no picture signal there?

Is the sound still working or does that shut off too?

Does the small power indicator light change color when you turn the set on and when it shuts off by itself?

If your screen stays completely black, then m
ost often this symptom is a result of a failing POWER SUPPLY but a faulty MAIN BOARD or INVERTER BOARD can certainly cause very similar symptoms. Unfortunately, without a donor TV to swap parts with or a dedicated test rig, it can be very difficult to differentiate between these problems.

One quick way to test this is to remove the rear access panel on the TV and replace the power supply circuit board with a new one, since this is the most often the source of the trouble.

You can usually find replacement supply circuit boards online by searching for your TV's model number.

Here is a link to the SHOPJIMMY.COM parts supplier website which lists all the replacement circuit boards available for your model of TV along with their prices:

http://www.shopjimmy.com/samsung-ln46b610a5fxza



And here is the direct link to the POWER SUPPLY CIRCUIT BOARD for your set:

http://www.shopjimmy.com/samsung-bn44-00265b-power-supply.htm


Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information and items at the website indicated.

The repair / replacement procedure is not extremely difficult if you have some basic electrical safety knowledge and some basic electronics / mechanical repair skills.

You will need to unplug the power cord from the unit, lay the TV screen side down on something soft and flat like a bed if necessary, and then remove the rear access panel or the entire rear cover as required in order to access the circuit boards inside.

When you remove the rear cover and access the circuit boards inside, just check the part number that is printed right on your circuit boards and confirm that they exactly match the ones provided in the online listing. Also make sure that any part you order is labelled "TESTED WORKING" in the condition description. Any part with a condition description of "AS IS" is probably faulty itself as well.

Then unclip and remove the various electrical wire connectors leading to the power supply circuit boards. Then remove the screws securing the circuit board to the TV frame and then remove the power supply circuit board. Be sure to avoid touching any large capacitors on the circuit board which can retain a nasty charge even after the unit is unplugged.

Then just screw in the new circuit board and connect all the wire bundles to their appropriate connectors on the new circuit board and then replace the rear cover. Then plug in the power cord and test.

Here is a link to another Expert's solution to a similar problem which includes links to his excellent and informative set of LCD TV / MONITOR TROUBLESHOOTING GUIDES:

http://www.fixya.com/support/t10008425-when_turn_tv_picture_flicks_off


These guides will give you some idea of the various problems with LCD monitors and the associated repair procedures.

If you choose to rate BUDMRTN's troubleshooting tips by clicking on the YES THIS WAS HELPFUL icon on his solution page at the above link, then I thank you very much for your time and consideration.

Please comment back here to this page if you have any details to add, have any questions, have difficulty with the links, or just require further general assistance and I will respond as soon as I see it.

I hope that was helpful to you, good luck.

Joe.

Posted on Sep 05, 2011

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if it's still under warranty- get it replaced!! while you can!
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