Question about Televison & Video

5 Answers

TV Turns off automatically

Just can not turn it on anymore. never had theis issue before my tv will be on for a while....and then poof! turns off and wont turn back on unless I unplug it and plug it back in. Sometimes that doesn't even work until I wait like ten minutes or so. Sometime hitting it works too. (I got frustrated) If you know how I can fix it myself I'm all ears.

Posted by on

  • 2 more comments 
  • Bryan_Kiefer Jul 04, 2008

    my tv will be on for a while....and then poof! turns off and wont turn back on unless I unplug it and plug it back in. Sometimes that doesn't even work until I wait like ten minutes or so. Sometime hitting it works too. (I got frustrated) If you know how I can fix it myself I'm all ears. I have a 32" Sharp standard tube tv. Not sure of the exact model. It's about 7 years old.

  • Bryan_Kiefer Jul 04, 2008

    Can I replace the tube so it holds the power?

  • Bryan_Kiefer Jul 04, 2008

    So, if it's a case of cold solder issues, please help me understand why it stays on for awhile, (most times 20min. somethimes days.) Also, if I hit it, it seemes to be the most effective although I would rather not keep doing that but that tells me something might be loose. (????) I'm not an electronic guy, so I don't quite understand.

  • Bryan_Kiefer Jul 05, 2008

    Thanks. I think I will take it in to a repair shop.

×

5 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 2,071 Answers

That is the oscillation sound comes from the relay,cannot continue because of protection mode,by the system.. Your tv parts is ok.only the solder joint is crack or cold thats why function abnormally,goes off and goes on, due to the voltage trap, when voltage is there the solder is hot and connect the parts joint, when voltage extremely hot, due to prolong use it will disconnect the solder joint parts thats why you cannot see picture..its need to reheat the solder joint of all parts affected....power supply section ,,horizontal section,vertical section ..and to microprocessor ic section including jungle ic..
find a tv technician to do the works .in order to avoid high voltage shock this not cost too much because only reheating works....

Posted on Jul 04, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 983 Answers

I think some component is getting over heated inside so you are facing this type of problem ....
the component may be transformer,capacitor on some circuit board ...
due to this temperature variation you tv will turn off ...
or may be some IC(intergrated circuit ) is gone ...
there will be one Video IC if it is gone means also you will this problem ...
if it is gone it will get heated very shortly so the tv will turn off due this variation in temperature ...

just have a check with these components.......


Posted on Jul 04, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi,

Based on your description, it would appear to be a case of cold solder issue (most likely) or heat related (just a possibility) or both interrelated.

Repairs wold require the application of a low wattage soldering iron at the determine cold solder joints. They can be determined by checking for those that are dull grayish in color as compared to the regular/good bright silvery. Should you not be able to determine the exact cold solder joint, a shotgun approach would also do. This is re-soldering most of the major joints with particular attention to the power devices such as the bridge diode, regulator IC, chopper transformer, capacitors in the power supply; the vertical IC; the flyback transformer pins and the Horizontal out. Often, the major joints would be bigger than the regular solder joints.

The above of course requires familiarity with electronic circuitry and components, use of a soldering iron and perhaps even a DVM. Should you be uncomfortable, then perhaps your best bet wold be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back on the model number how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 04, 2008

  • Louie  Role
    Louie Role Jul 04, 2008

    Hi again,

    Appreciate the postback....

    cold solder issues - each component is soldered into small holes on the printed circuit board which in turn connects said component to the other components. Due to time, heat, use, some solder joints would be cracked or loose. It is possible that the cold solder is still minimally connected (hanging by a thread). When the TV turns on heat would be generated which would be sufficient to further loosen up the solder joint to the point it no longer provides electrical contact. Jarring the unit creates movement inside enough to re establish the contact, sometime good enough sometimes not enough.

    Again, since the unit still operates (sometimes) then it is highly probable that there are no defective components. As you have surmised, it is possibly a loose connection, solder joints are "connections" except that molten soldering lead is used to attach/connect the component to the board, "loose connection" in this sense is equal to "cold solder".

    Again on the assumption of no defective parts, then seeking a more experienced buddy for the soldering might be to your advantage. This is of course in addition to the possible electrical hazards when repairing the inside of a TV unit for any lay/unexperienced repair person.

  • Louie  Role
    Louie Role Jul 04, 2008

    This might be of help to you.



×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,879 Answers

Greetings,

Your tube is experiencing power supply failure. Can't sustain electrical power for the whole system.

If you do electronic troubleshooting, check the power supply section. Else, get a qualified repairman.

Keep us posted and thank you for using our service.
FixYa for all your troubleshooting needs.

Posted on Jul 04, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 848 Answers

Your tv is having powersupply problem

smps might not be working properly check it

the power supply is not reaching the main board properly

give details about your tv - make and model number

Posted on Jul 04, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

TV turns on then turns off right away


In an answer to your problem, fuse could possibly be good and not blown

basing on your post "
TV turns on then turns off right away "

A fault or two have been detected so the TV will automatically shut off

to prevent further damage.



You will be needing tools, equipment , good vision and a lot of

patience when working with TV.


here is a troubleshooting guide should you need to DIY

Flyback Transformer



• Must have supervision of a qualified service technician


let us know if you need further assistance.

Sep 23, 2012 | Toshiba 32HFX72 32" TV

1 Answer

Toshiba 20hlv15 image turns bright colors and will sometimes disappear.


I will check what toshiba says about this problem, but in the meantime, make sure your tv is not overheating, make sure all airvents are open, you said you took it apart so I supose you cleaned all the dust and so on.

Il get back to you.

Mar 30, 2008 | Toshiba 20HLV15 TV

1 Answer

Turn on and stay on


It seems that Your TV set may have a problem with its power supply circuit, the problem is intermitent bring it to the repair shop.

Nov 06, 2008 | Televison & Video

1 Answer

Philips/Magnavox TV, model MS3250C321 shuts off randomly.


TV shutting off automatically means its a problem with the Lamp. Contact Pioneer or any local tech shop or Best buy and get the same replaced.
Turning off after specific time : Go to the timer option and disable the Automatically Switch off option. This will resolve the issue. Please let me know if it worked. If you need the user manual or instruction manula please click on the link below
http://www.generalmanual.com/Televisions/Sanyo-DP19647-Wide-Screen-Integrated-Digital-LCD-HDTV.htm. Hope this will be of help to you.

Thanks

Oct 17, 2008 | Televison & Video

3 Answers

Sylvania 6419TC


My Sylvania T.V. turns on and then it turns off by itself. It only stays on for onr minute.

Aug 10, 2008 | Sylvania 6419TC 19" TV

2 Answers

TV Turns Off


You may also have a capacitor that is going bad or is on the verge of going poof. Anyhow, check for any leakage on the PCB and if you have a capacitor checker check all the caps. Visual inspection may find it as well...Good luck technician. GURU JAY

Feb 18, 2008 | Televison & Video

1 Answer

RCA F36649 36" TV


I had this happen. (ontop of the button board infront shorting out). I took the back off, and if your looking at the screen it'll be on your right. There is a metal box with two ribbons coming out of them, I unplugged both and plugged both in, and now she turns on without any issues. Not sure why, but it works. Now if I could get some help finding the circut board with the front buttons on it. I.e channel up down and volume.

Nov 07, 2007 | RCA F36649 36" TV

1 Answer

Volume will not stay up


replace your tact switch ,the switches that are in your panel board of your tv. 

Jul 10, 2007 | JVC AV-27020 TV

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

52 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

69739 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6370 Answers

yadayada
yadayada

Level 3 Expert

63661 Answers

Are you a Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...