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Have a samsung TV UN40H5203AFXZA will not turn on. When plugged in the stand-by light blinks seven times and goes off. Changed power,main and Tcon boards. 3 lights come on the Tcon board but go off.

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Please un-plug the cable between the main board & the power supply, apply the AC power to it, if the back lights come on & still on, replace the main board; if the back lights did not come on, mostly the problem is defective back light LED strips.

Posted on May 27, 2017

  • Ronald Albright May 27, 2017

    TV has never had any back lighting. After being plugged in for 10 minutes the stand-by light comes on. Once you push the button it starts blinking. I guess its trashed?

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Posted on Jan 02, 2017

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Hi have Samsung tv(UN40H5203AFXZA) Version:TD01. It doesn't turn on just red light blinking, no sound/ pics.How can I know if it's main board or power supply board and what should I buy? Thank you


Hello Anas,
These failure could be a combination of the power supply and the main board failing.
I would suggest to replace both boards or if you are able to measure the voltages from the power supply and verify that the power supply is working, then you should only replace the main board.
Let me know if you require further assistance.
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Jun 11, 2017 | Samsung Televison & Video

1 Answer

Sony Screen wont turn on. Replaces tcon. No Power going to tcon.


Hi Nick, Please trace the 12V line. Most probably it is coming from the main board.

Dec 10, 2016 | Sony Televison & Video

2 Answers

How do I fix a Samsung UN40H5203AFXZA LED that TV flashes when I plug it in.


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Oct 11, 2016 | Samsung Televison & Video

1 Answer

Sony trinitron kd-34xs955 standby light is blinking 7 times


Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
As you can see here, seven blinks of standby light is due to some over voltate at the final anode of the picture tube. This is a protection process that going on insde the tV circuits, to prevent more damage to other comnponents on board. The most common cause for this is with the main power regulator out voltage itself. If any way, it ahs exceeded 135VDC, this kind of fault will occur. Check the main power regulator section circuit for any damaged component/s. Replace all the small electrolytic capacitors there. Visit the site named 'Electro-help' for more details. Check this LINK and select the site named above. View it in 'Flip card' option, which can be selected from the drop down box menu at the left top corner or the display window. It will make search easy. Some times, the ads attached with each posts might help you to find the availability of spare parts. There are more than 550 posts to different brand TVs. Blinking codes and details are there.


Aug 09, 2012 | Sony FD Trinitron KD-34XS955 34" TV

1 Answer

I have a sony wega trinitron, when the tv is turned on, (no visual, or sound) the red stand by light blinks 7 times, and you hear the tv click off? Please help


Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

Jun 06, 2011 | Sony FD Trinitron WEGA KV-36FS120 36" TV

1 Answer

Stand by light blinking 7 times. occassionally turns on when pressing reset and power button.


  • Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
There is a High Voltage fault or power supply fault.
Hope that helps.

Dec 09, 2010 | Sony FD Trinitron WEGA KV-30XBR910 30" TV

1 Answer

My sony tv automatically goes into stand by mode and we have already changed the power supply as solution given by fixya .com


If the unit is playing normally then goes to stand-by, it could be also caused by the main board and or the ballast boards. If it is caused by the ballast boards, it should give you error code with the red stand-by light blinking 11 or 13 times. If the stand-by light does not blink a code, it is probly the main board.
I hope this helps,
Skyassoc

Dec 08, 2010 | Sony KLV32S400A 32 in. LCD TV

1 Answer

Red LED light blinks 7 times when the set is turned on; no pictur


if you have the circuit diagram of your tv,check the horizontal polarisation IC closer to the line transformer and replace it.If it doesn't work,send the question again.

Sep 22, 2009 | Sony FD Trinitron WEGA KV-34HS420 34" TV

2 Answers

RED LIGHT BLINKS SEVEN TIMES


The most likely problem are two failed capacitors on the main board in the center of the TV The failed parts are easy to identify as the top of the cap will no longer be flat but will have bulged up. DO NOT attempt to remove the back of the TV unless you know what you are doing.
soldering on a circuit board will be required to fix this problem.

Aug 10, 2009 | Philips 42PF7220A 42 in. Plasma Television

1 Answer

Stand by light blinks 6 times, wont power on


Here you find sony blinking codes

SIX Blinks---No Horizontal (H STOP), no raster, goes to the blinking selfdiagnosis
function immediately. Check C515 & 516 and the jungle IC, IC206.

SEVEN Blinks---High voltage shutdown. The high voltage has exceeded 33k
and the unit goes immediately into safety shutdown. Check power supply
regulation and horizontal circuits.

Aug 10, 2008 | Sony FD Trinitron WEGA KV-36HS510 36" TV

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