Question about Hisense Televison & Video

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Have a Hisense 40H3E tv that the screen went black on (Still has sound). You can see the picture if you shine a light on it. I took it apart and tested the led output with my multi-meter and it gets about 48V out with the strips connected to the board as well as with the strips disconnected. I did a lot of googling and reading of YouTube comments but could not find out what the reading should be for my TV. Does anyone know if this indicates a bad board or bad LEDs? Some more info: When I turn it on the standby light flashes 9 times, one long first flash followed by 8 shorter ones I found no signs of blown capacitors or burns on the board. It started with the top half of the screen going darker first followed by all the screen getting really dark but still visible without a flash light then finally the screen going black and needing a flashlight to see the images. This all happened relatively fast within a night. When I noticed the whole screen go dark I turned it on and off to see if that would fix it. I was able to see the hisense logo just fine but by the time the roku loaded it went dark again. Another power cycle yielded me the black screen with just sound and it has stayed that way since. Does anyone happen to know what the voltage should be to the LED Strips or what I should replace first Thank you!

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1 Answer

Arnie Burke

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U can unplug set awhile but may helpit temporarily. Tv is old n worn. Anew one is cheapr then fixn. Think wal*mart

Posted on Apr 05, 2020

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2 Related Answers

gopakumarg43

The Knight

  • 76785 Answers

SOURCE: Hisense tv 55k610gwn, 11 light flashes error code. All leds flash for logo, then no video. Led drive voltage 200+ dc. Power supply or leds?

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.

Posted on Oct 18, 2016

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vincenttesta

L Vincent Testa

  • 721 Answers

SOURCE: LG TV 39LN5300 - What is normal voltage at LED connection to power supply?

ok so the problem is not with the power suppkly it is with the leds inside the panel they are in strings and usually only a few of them are your problem see the link for led prices http://www.shopjimmy.com/auo-t390hvn02-2-led-strips-8-strips.htm

Posted on Feb 16, 2018

Testimonial: "Had thought that it was the LEDs but with only minimal knowledge was not sure. I don't know why the voltate would be over 200 volts. As for ordering LED strips I have heard that they were panel specific, and have heard that they weren't. The link you provided is out of stock, unfortunately. Is basically any 39" strip useable or does it need to be matched to the panel? Thanks again."

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Jerry G.

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