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Troubleshooting my tv does not turn on and i want to know the right connection of a power transistor in the tv receiver.and i want to know how can i check whether the line output transfomer and the transformer next to it is faulty or not

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  • Anonymous Jun 04, 2008

    when I press the power button the tv does not turn on but the standby light blinks 9 times. when the problem first started the tv would turn on after pressing the power button a couple of time and after about 2 days then it stopped working all together.

  • nobigtv Sep 02, 2008

    kp-46wt520 will not come on stand by lt bkinks

  • SteveoTivo Jan 09, 2009

    I have no power at all, my wife called Direct TV and they told her to unplug it 15 seconds. It never powered back up the fan works but there is no yellow or red lights. Dose this mean the hard drive burned out?

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If you want us to help you, you must provide the make and model of your set.

Posted on Aug 29, 2007

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1 Answer

Why do i have no audio or faults.


1. speakers not attached correctly.
2. power not turned on
3. volume turned too low.
4. blown fuse.
5. blown power transistors.
6. antenna not connected properly
7. wrong selector switch pressed, receiver in wrong mode.

Given that you've provided no information at all as to whether the unit was working properly previously; if the unit stopped working while it was playing; whether the unit was fine until the last time you powered it off; anything you did prior to the unit not working such as disconnected the system and reconnected it again, etc. the possibilities above may provide your solution.

If the unit is producing an error code, get a copy of the manual and look up the error code.

Otherwise, the unit may need to be repaired.

Apr 13, 2015 | Pioneer Elite VSX 51 AV network receiver

5 Answers

No audio output


check whether the plugs are inserted properly and check whether the pins are working properly

Jun 20, 2008 | Kenwood VR-407 Receiver

1 Answer

Integra 5.3 keeps turning off so TV will not go on. It flips back to standby mode after 2 seconds and screen says check signal cable or check connections. This issue started yesterday with a loud noise...


you most likely have a blown main output transistor or a shorted speaker. first get a mutimeter and set to lowest ohms setting and check for 4-8 ohms ( CHECK IMPEDENCE rating on back of speaker) at the speaker terminal of the speaker. if this checks out then you take the meter and set to DC and place the + / - terminals to the speaker connection on back of receiver then turn on the receiver . notice if you have any dc voltage at any sp terminal, if dc is present you have a blown output transistor. If you are not an electronic tech please refer your unit to a qualified service tech. I hope this helps.

Jan 16, 2014 | Integra DTM-5.3 Receiver

1 Answer

Videocon bazoomba tv not turning on, it takes many power switching on and off to turn on the tv


Check its horizontal output stage circuit for any short. Check the horizontal output transistor, for collector to emitter, of collector to base, leak. Replace it with a new one and check whether the newly replaced transistor gets too hot. If so, suspect the FBT. To get some details, http://electronicshelponline.blogspot.com/ Pull up older posts.

Dec 10, 2013 | Televison & Video

1 Answer

What causes the horizontal transistor to short? flybak ok, supply line ok. my tv is a samsung with a model #: ct-21k30mh.


Hello
You just replace the capacitor fitted very near to the horizontal output transistor,[freewheeling capacitor], there may be one or two of them, whcih comes to a value of 3900pf to 6700pf 2000V or so. It is connected to the negative rail and the collector of the horizontal output transitor. If it gets opened, or its value gets reduced, this fault will occur. If so the transistor you replace will get shorted as you swich on the power to TV.
The second one is deflection yoke short. If so the transistor said above will overheat within seconds. Even a single winding inside the horizontal deflection yoke shors, it puts a tremendous load to flyback transformer, which in turn effects the transistor.
After replacing the above said capacitor, you do one thing to make sure about whether there is a short inside the yoke or not. It cannot be measured by normal methods. Fore that, unplug the base card from picture tube and place it somewhere near without getting any of its contacts to other parts inside your TV. This time only the EHT chord will be connected to picture tube. Unplug the horizontal yoke connection from main board. Switch on the tv, and wait for some time, say at about 10 seconds, and check whether the transistor gets overheated or not If it does overheats now also, the winding or EHT retifier diodes inside your flyback transformer has some trouble, and it should be replaced with same type and number. If it does not overheats now, the deflection yoke's winding have some short in it. Ok.
NB: Never connect the TV with base card is in postion while deflection yoke connection is isolated. keep it unpluged.

Oct 27, 2010 | Samsung Ultra SlimFit 20" Digital TV

2 Answers

No power, stanby only


standby sont tv?...you need to open the back cover of your tv..check whether you fuse are blown/open...if yes,do not replace right away the fuse there might be a problem on the main supplys...using yuor multitester check your horizontal output transistor..it is located near the plyback transformer..if you do not now the correct testing of the transistor replace it with a new transistor...same with the regulator replace it with a new one...then replace the fuse ..your tv is now working again..

May 18, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

I HAVE AN ONKYO TX SR500 AV RECEIVER WITH A 5.1 BOSE SURROUND SOUND SYSTEM WITH SONY TV. MOST RECENTLY ONLY ONE OF MY SPEAKERS IS WORKING ON MY SURROUND SOUND. ALL WIRES ARE CONNECTED. I CHECKED ALL...


The symptom you described can be caused by any number of things. I always start with the output power transistors which are the first things to blow with a speaker output overload condition. Unplug the power cord to your unit, remove the top cover and use an ohmmeter to check resistance from C to E on all 10 of the power transistors (Q6050 thru 54 and Q6060 thru 64) attached to the large heat sink. Blown transistors typically read <1 ohm, compared to good transistors that are >10k ohms. If you find a bad transistor it will need to be replaced.

Jan 25, 2009 | Onkyo TX-SR500 Receiver

3 Answers

Sharp TV 21" screen with a switch mode power supply.


i have a tv receiver with a problem of no power going to the whole system thiis transistor c3807 and connected to bigger transistor c4458 are gone together with connecting diodes.any solution please?

Sep 19, 2008 | Televison & Video

1 Answer

Power don't turn on


Look for a large aluminum heat sink with the output transistors bolted to it. You should see anywhere from 4 or more large transistors bolted to it. I doubt that the protection circuit is malfunctioning. I would bet that it is doing exaclty what it is supposed to do. If you do find some bad output transistors, be sure to check all the components that work in conjunction with those transistors. Good luck.

Apr 07, 2007 | Denon AVR-1400 Receiver

2 Answers

Blown something? No amplification?


If you hear a faint sound I doubt if a fuse is blown?? never Know though. You have to have and know how to use a DVM or muti-meter to trouble shoot solid state electronics, as well as know how to solder and check transistors and other electronic parts. There wouldnt be one particular thing that could cause your problem. There could be a several things wrong as transistors and ICs tend to snowball and short out or open up with power surges. If you want , first get a schematic, but if you dont know how to read one stop right here and save your money and upgrade to a shiney new stereo system.. Good Luck

Aug 05, 2006 | JVC RX-318 Receiver

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