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Hisense 50k22dg should i replace led strips first or power board

Have sound no picture see writing with flashlight,no back lit light

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I would inspect the power board for mushroomed caps and brunt traces. A edge lit led screen has two ribbon cables coming from the power supply, I would unplug one at a time to see if one side lights up. Both led strips rarely go bad at the small time. The problem is most likely in the power supply.

Posted on May 03, 2017

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Sony green power/standby led blinks picture goes out

I had this same problem and after doing some research, I removed the lamp, cleaned it and plugged it back in. It fixed my problem completely.

Posted on Mar 30, 2008

javswr
  • 44 Answers

SOURCE: No Picture & No sound. Red LED, Green LED, Red LED.

If the power supply outputs are good! Then I would say the back light inverter is bad! If the screen stays black and does not come on.

Posted on Feb 28, 2009

  • 195 Answers

SOURCE: olevia 437-s11

Most likely the CCFL inverter has been the problem all along....

Posted on Oct 10, 2009

  • 1 Answer

SOURCE: Have a Hitachi 53sdx89BA Rear Projection TV. Turn

Discharged Flyback Transformer. Removed main pc board from bottom of TV and flipped over, no apparent damaged components or blown board traces were found. Noticed a lot of flux in various areas on the board that seemed unusual (maybe TV was worked on before as I bought a showroom demo at Circuit City). Used a plastic screwdriver to remove all flux between connections on ICs, Transformers, Flyback Transformer, and various other components. Cleaned all debris, dust and crud accumulation (TV is over 10 years old and there was alot around the Flyback Transformer) from both sides of board using a lightweight paint brush.
Used a magnifying glass to check all solder joints for possible cold solders and found none. Did the same for Power Supply Board. Checked various ICs and Power Transistors for opens or shorts (in machine) and they seemed fine. Reinstalled boards, said a few Hail Mary's and fired it up.

The protector Led no longer flashed under power and lo and behold I got picture and sound!

I cleaned the lens on the projectors (again 10 years of dust accumulation) did a magic focus adjustment and it works fine!

After reading other fixes, I fully expected it to die after 10 minutes so I left it on all day and against all odds it still works.

What was the fix......Dirt buildup on and around Flyback and other components,,,,,,Flux conducting electricity between contacts on Flyback and other components.....or oxidation on connectors between Power Supply and Main Board.....I don't know.... all I know is that for the moment I saved around $ 300 - 400 in repair bills by doing it myself.

Posted on Feb 02, 2010

  • 1 Answer

SOURCE: Clicking relay no picture no audio no power light red or blue

here is the schematics http://www.scribd.com/doc/33598674/Philips-42mf231d-Chassis-Tpe1-0u-Pa

Posted on Aug 14, 2010

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I have a HISENSE 32 LED TV, MODEL #32K20DW -A, SER #32J141913H05831.


If it was me i would check the voltages to the back-lights first and if the voltages are ok i would look at testing the led strips them selfs but if you have never done this before i would recommend taking it to an engineer but if the voltages are not ok change the power board.
Hope this helps.

Oct 16, 2017 | Hisense Televison & Video

3 Answers

I have an LG 47LN522-UB LED TV that stopped working after three years and need help diagnosing a problem with it.


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Apr 26, 2017 | LG Televison & Video

1 Answer

LG LED LN5200 3 LED strips flash 3 do not. I do have sound and can see screen with flashlight and red power LED flashes 3 times.


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Dec 25, 2016 | LG 47 Inch LED TV 47LN5200 LN5200 Series...

1 Answer

Black screen on seiko led tv


Depends on the make and model of the unit. You did not say what it is. Some have bad LED backlight strips and others have bad inverters or PSU's.

Dec 09, 2016 | Televison & Video

3 Answers

Hisense 50h5g model the backlights are blinking the pictures is really dark but sound quality is still good what may be the issue


Perhaps the backlight LED driver board needs to re-seated.
Also check flex wire connectors for loose connection.
reseat or replace

Aug 16, 2016 | Hisense Televison & Video

1 Answer

LED TV no picture, but sound. Did flashlight test and determined backlight is the problem. Power supply/inverter or bad LED?


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/

To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Jun 17, 2016 | Westinghouse Televison & Video

1 Answer

Hisense 50k22dg half the picture dim out


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

May 14, 2016 | Hisense Televison & Video

2 Answers

On my Hisense 50K23DG LED TV, I have sound but no picture.


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1 Answer

I have a Hisense tv model-32k20dw. I can hear sounds from it and when I did the flashlight test I could see the picture. Already replaced pwr supply. What else could be wrong? Can I fix it?


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/.
Some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

Jul 26, 2015 | Hisense Televison & Video

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