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My oki television picture goes off after one minute but the sound remains on?

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  • Televison & ... Master
  • 36,408 Answers

The power supply is failing

Posted on Jan 17, 2013

  • Rob Jennings Jan 17, 2013

    Hi Tom, Can this be fixed?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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jerryg50
  • 1667 Answers

SOURCE: screen goes out but sound remains

A blown fuse would not be intermittant.

It is possible that the back plane lamps, and or the back plane power supply is failing.

When the set is in the dark screen, shine a flashlight on the screen at an offset angle. Look carefully and see if you see the picture images. If so, this proves that the back plane lighting is having a fault condition. If there is no image at all, then there may be a fault condition with one of the drive boards for the picture processing or the screen itself.

Jerry G.

Posted on May 17, 2008

Shuttle83
  • 1139 Answers

SOURCE: samsung plasma ppm42s3 , picture wobbling,sometimes screen goes blank

Hello arunaik_6,

This looks as if a component has become thermally sensitive. The best way to find this is to use component cooling spray. It looks as if the problem is localized to the tuner section. Take the back off of the TV and turn the TV on, wait until the problem occurs and lightly spray the tuner section with the component cooling spray watch for any reaction, then if this does not work spray the Microprocessor and the LVDS section and watch for a reaction. The set should go back to normal when it does that section is the problem, try to localize the problem to one component. Then replace that component.

I hope this helps,

Thank you,

Shuttle83
http://www.electron-age-technologies-llc.com

Posted on Dec 16, 2008

xCAUSALITYx
  • 210 Answers

SOURCE: picture goes off after a few minutes but sound

Hi,

There are a number reasons why this might happen:

  • The backlight has gone (Find a dark place and shine a torch into the screen and see if you can see an image in the background, if you see an image then the backlight has gone) - Needs a new backlight (Engineer to remove and fit) or have a new panel fitted.
  • The panel has died - Need a new panel
  • A cable has worked itself loose or is broken
  • The inverter has gone - Need new inverter
  • The driver board is faulty
Thanks

Posted on Oct 02, 2009

  • 175 Answers

SOURCE: Picture goes black, sound OK

is it under warranty, it could be the ysus or the panel

Posted on Apr 27, 2010

caroldon
  • 17130 Answers

SOURCE: About 5 minutes after TV

This is a common fault solution which can be checked and corrected by you assuming that there is no component failure. There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.

Check for tips to look into the SMPS unit with some of my tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Thank you for using Fixya.


Posted on Aug 17, 2011

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A blown fuse would not be intermittant.

It is possible that the back plane lamps, and or the back plane power supply is failing.

When the set is in the dark screen, shine a flashlight on the screen at an offset angle. Look carefully and see if you see the picture images. If so, this proves that the back plane lighting is having a fault condition. If there is no image at all, then there may be a fault condition with one of the drive boards for the picture processing or the screen itself.

Jerry G.

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